The Basic Units of the SI System

Physical QuantitySI UnitAbbreviationLength1  meter1  mMass1  kilogram1  kgTime1  second1  sElectric Current1  ampere1  ATemperature1  kelvin1  KBrightness1  candela1  cdAmmount of Substance1  mole1  mol\def\arraystretch{1.5} \begin{array}{ccc} \hline \textup{Physical Quantity} & \textup{SI Unit} & \textup{Abbreviation} \\ \hline \textup{Length} & 1\;\textup{meter} & 1\;\textup{m} \\ \textup{Mass} & 1\;\textup{kilogram} & 1\;\textup{kg} \\ \textup{Time} & 1\; \textup{second} & 1\; \textup{s} \\ \textup{Electric Current} & 1\; \textup{ampere} & 1\; \textup{A} \\ \textup{Temperature} & 1\; \textup{kelvin} & 1\; \textup{K} \\ \textup{Brightness} & 1\; \textup{candela} & 1\; \textup{cd} \\ \textup{Ammount of Substance} & 1\; \textup{mole} & 1\; \textup{mol} \\ \hline \end{array}

Derived SI base units

QuantityUnitSI base unitAcceleration,a1  m/s21  m⋅s−2Work,A1  J=1  Nm1  kg⋅m2⋅s−2Density,ρ1  kg/m31  kg⋅m−3Effect,P1  W=1  J/s1  kg⋅m2⋅s−3Charge,Q1  C1  A⋅sVoltage,U1  V=1  J/C1  kg⋅m2⋅s−3⋅A−1Electric field,E1  N/C=V/m1  kg⋅m⋅s−3⋅A−1Frequency,f1  Hz1  s−1Inductance,L1  H1  kg⋅m2⋅s−2⋅A−2Capacitance,C1  F1  kg−1⋅m−2⋅s4⋅A2Force,F1  N1  kg⋅m⋅s−2Magnetic field,B1  T1  kg⋅s−2⋅A−1Resistance,R1  Ω1  kg⋅m2⋅s−3⋅A−2Pressure,p1Pa=1  N/m21  kg⋅m−1⋅s−2\def\arraystretch{1.5} \begin{array}{|c|c|c|} \hline \textup{Quantity} & \textup{Unit} & \textup{SI base unit} \\ \hline \textup{Acceleration}, a & 1\; \text{m}/\text{s}^2 & 1\; \text{m} \cdot \text{s}^{-2}\\ \textup{Work}, A & 1\; \text{J} = 1\; \text{Nm} & 1\; \text{kg} \cdot \text{m}^2 \cdot \text{s}^{-2} \\ \textup{Density}, \rho & 1\; \text{kg}/\text{m}^3 & 1\; \text{kg} \cdot \text{m}^{-3} \\ \textup{Effect}, P & 1\; \text{W} = 1\; \text{J}/\text{s} & 1\; \text{kg} \cdot \text{m}^2 \cdot \text{s}^{-3} \\ \textup{Charge}, Q & 1\; \text{C} & 1\; \text{A} \cdot \text{s} \\ \textup{Voltage}, U & 1\; \text{V} = 1\; \text{J}/\text{C} & 1\; \text{kg} \cdot \text{m}^2 \cdot \text{s}^{-3} \cdot \text{A}^{-1} \\ \textup{Electric field}, E & 1\; \text{N}/\text{C} = \text{V}/\text{m} & 1\; \text{kg} \cdot \text{m} \cdot \text{s}^{-3} \cdot \text{A}^{-1} \\ \textup{Frequency}, f & 1\; \text{Hz} & 1\; \text{s}^{-1} \\ \textup{Inductance}, L & 1\; \text{H} & 1\; \text{kg} \cdot \text{m}^2 \cdot \text{s}^{-2} \cdot \text{A}^{-2} \\ \textup{Capacitance}, C & 1\; \text{F} & 1\; \text{kg}^{-1} \cdot \text{m}^{-2} \cdot \text{s}^{4} \cdot \text{A}^{2} \\ \textup{Force}, F & 1\; \text{N} & 1\; \text{kg} \cdot \text{m} \cdot \text{s}^{-2} \\ \textup{Magnetic field}, B & 1\; \text{T} & 1\; \text{kg} \cdot \text{s}^{-2} \cdot \text{A}^{-1} \\ \textup{Resistance}, R & 1\; \Omega & 1\; \text{kg} \cdot \text{m}^2 \cdot \text{s}^{-3} \cdot \text{A}^{-2} \\ \textup{Pressure}, p & 1 \text{Pa} = 1\; \text{N}/\text{m}^2 & 1\; \text{kg} \cdot \text{m}^{-1} \cdot \text{s}^{-2} \\ \hline \end{array}

SI-prefix

SI-prefixSymbolDecimalYottaY1e24ZettaZ1e21ExaE1e18PetaP1e15TeraT1e12GigaG1e9MegaM1e6Kilok1e3Hectoh1e2Decada1e1Decid1e−1Centic1e−2Millim1e−3Microµ1e−6Nanon1e−9Picop1e−12Femtof1e−15Attoa1e−18Zeptoz1e−21Yoctoy1e−24\def\arraystretch{1.5} \begin{array}{|c|c|c|} \hline \textup{SI-prefix} & \textup{Symbol} & \textup{Decimal} \\ \hline \textup{Yotta} & \textup{Y} & 1e24 \\ \textup{Zetta} & \textup{Z} & 1e21 \\ \textup{Exa} & \textup{E} & 1e18 \\ \textup{Peta} & \textup{P} & 1e15 \\ \textup{Tera} & \textup{T} & 1e12 \\ \textup{Giga} & \textup{G} & 1e9 \\ \textup{Mega} & \textup{M} & 1e6 \\ \textup{Kilo} & \textup{k} & 1e3 \\ \textup{Hecto} & \textup{h} & 1e2 \\ \textup{Deca} & \textup{da} & 1e1 \\ \hline \textup{Deci} & \textup{d} & 1e-1 \\ \textup{Centi} & \textup{c} & 1e-2 \\ \textup{Milli} & \textup{m} & 1e-3 \\ \textup{Micro} & \textup{µ} & 1e-6 \\ \textup{Nano} & \textup{n} & 1e-9 \\ \textup{Pico} & \textup{p} & 1e-12 \\ \textup{Femto} & \textup{f} & 1e-15 \\ \textup{Atto} & \textup{a} & 1e-18 \\ \textup{Zepto} & \textup{z} & 1e-21 \\ \textup{Yocto} & \textup{y} & 1e-24 \\ \hline \end{array}

Constants

NameVariableValueUnitSpeed of light in a vacuumc299 792 458m/sPlanck’s constanth6.626 070 15⋅10−34JsPlanck’s constanth4.135 667 87⋅10−15eVsPlanck’s constantℏ1.054 573⋅10−34JsPlanck’s constantℏ0.658 212⋅10−15eVsThe Elemental Chargee1.602 176 634⋅10−19CBohr Radiusa00.529 177⋅10−10mElectron Massme0.910 938⋅10−30kgElectron Massme0.510 999MeV/c2Proton Massmp1.672 6219⋅10−27kgProton Massmp938.2723MeV/c2Proton Massmp1836.152 70meNeutron Massmn1.674 929⋅10−27kgNeutron Massmn939.5656MeV/c2Neutron Massmn1838.683 62meBoltzmanns Constantk1.380649⋅10−23J/KBoltzmanns Constantk0.861 739⋅10−4eV/KAvogadros ConstantNA6.02 214 076⋅1023mol−1Rydbergs ConstantRyℏ22ma02Rydbergs ConstantRy13.6057eVRydbergs ConstantRy109 737.32cm−1The General Gas ConstantR8.3145J/(mol⋅K)The Fine Structure Constantαe24πε0ℏc=1137.036Dielectric Constant for Vacuumε00.885 419⋅10−11As/VmPermeability of Vacuumμ01.256 637⋅10−6Vs/AmPermeability of Vacuumμ04π⋅10−7Vs/AmThe Bohr MagnetoneμBeℏ2m=9.274 02⋅10−24Am2The Acceleration of Gravityg9.80665m/s2\def\arraystretch{1.5} \begin{array}{|c|c|c|c|} \hline \textup{Name} & \textup{Variable} & \textup{Value} & \textup{Unit} \\\hline \textup{Speed of light in a vacuum} & c & 299\,792\,458 & \textup{m/s} \\ \textup{Planck's constant} & h & 6.626\,070\,15\cdot 10^{-34} & \textup{Js}\\ \textup{Planck's constant} & h & 4.135\,667\,87\cdot 10^{-15} & \textup{eVs}\\ \textup{Planck's constant} & \hbar & 1.054\,573\cdot 10^{-34} & \textup{Js}\\ \textup{Planck's constant} & \hbar & 0.658\,212\cdot 10^{-15} & \textup{eVs}\\ \textup{The Elemental Charge} & e & 1.602\,176\,634\cdot10^{-19} & \textup{C} \\ \textup{Bohr Radius} & a_0 & 0.529\,177\cdot10^{-10} & \textup{m} \\ \textup{Electron Mass} & m_e & 0.910\,938\cdot 10^{-30} & \textup{kg} \\ \textup{Electron Mass} & m_e & 0.510\,999 & \textup{MeV/c$^2$} \\ \textup{Proton Mass} & m_p & 1.672\,6219\cdot 10^{-27} & \textup{kg} \\ \textup{Proton Mass} & m_p & 938.2723 & \textup{MeV/c$^2$} \\ \textup{Proton Mass} & m_p & 1836.152\,70 & m_e \\ \textup{Neutron Mass} & m_n & 1.674\,929\cdot 10^{-27} & \textup{kg} \\ \textup{Neutron Mass} & m_n & 939.5656 & \textup{MeV/c$^2$} \\ \textup{Neutron Mass} & m_n & 1838.683\,62 & m_e \\ \textup{Boltzmanns Constant} & k & 1.380649\cdot 10^{-23} & \textup{J/K} \\ \textup{Boltzmanns Constant} & k & 0.861\,739\cdot 10^{-4} & \textup{eV/K} \\ \textup{Avogadros Constant} & N_A & 6.02\,214\,076\cdot 10^{23} & \textup{mol}^{-1} \\ \textup{Rydbergs Constant} & R_y & \frac{\hbar ^2}{2 m a_0^2} & \textup{} \\ \textup{Rydbergs Constant} & R_y & 13.6057 & \textup{eV} \\ \textup{Rydbergs Constant} & R_y & 109\,737.32 & \textup{cm}^{-1} \\ \textup{The General Gas Constant} & R & 8.3145 & \textup{J/(mol}\cdot\textup{K)} \\ \textup{The Fine Structure Constant} & \alpha & \frac{e^2}{4\pi\varepsilon _0 \hbar c} = \frac{1}{137.036}& \textup{} \\ \textup{Dielectric Constant for Vacuum} & \varepsilon_0 & 0.885\,419 \cdot 10^{-11} & \textup{As/Vm} \\ \textup{Permeability of Vacuum} & \mu_0 & 1.256\,637\cdot 10^{-6} & \textup{Vs/Am} \\ \textup{Permeability of Vacuum} & \mu_0 & 4\pi \cdot 10^{-7} & \textup{Vs/Am} \\ \textup{The Bohr Magnetone} & \mu_B & \frac{e \hbar}{2 m} = 9.274\,02 \cdot 10^{-24} & \textup{Am}^2 \\ \textup{The Acceleration of Gravity} & g & 9.80665 \textup{m/s}^2 \\ \hline \end{array}

Pressure for Satturated Steam (boiling pressure) at Different Temperatures

WaterMercuryt/°CVapor Pressure/PaVapor Pressure/Pa−3038.1637.0⋅10−6−201032.41⋅10−3−151654.52⋅10−3−102608.08⋅10−3−540114.3⋅10−3061024.7⋅10−3587240.7⋅10−3101.23⋅10365.0⋅10−3151.70⋅1030.103202.34⋅1030.160253.17⋅1030.246304.24⋅1030.370355.64⋅1030.553407.37⋅1030.8105012.3⋅1031.696019.9⋅1033.377031.2⋅1036.438047.3⋅10311.99070.1⋅10321.1100101.3⋅10336.4110143.2⋅10361.0120198.4⋅10399.4130270.0⋅103158.1150476.0⋅103374.0⋅1032001.55⋅1062.30⋅1032503.97⋅1069.92⋅1033008.59⋅10632.9⋅10335016.5⋅10689.7⋅10337422.1⋅106137.0⋅103400−210.0⋅103\def\arraystretch{1.5} \begin{array}{|c|c|c|} \hline \textup{} & \textup{Water} & \textup{Mercury} \\ \hline \textup{t/°C} & \textup{Vapor Pressure/Pa} & \textup{Vapor Pressure/Pa} \\ -30 & 38.1 & 637.0\cdot 10^{-6} \\ -20 & 103 & 2.41\cdot 10^{-3} \\ -15 & 165 & 4.52\cdot 10^{-3} \\ -10 & 260 & 8.08\cdot 10^{-3} \\ -5 & 401 & 14.3\cdot 10^{-3} \\ 0 & 610 & 24.7\cdot 10^{-3} \\ 5 & 872 & 40.7\cdot 10^{-3} \\ 10 & 1.23\cdot 10^3 & 65.0\cdot 10^{-3} \\ 15 & 1.70 \cdot 10^3 & 0.103 \\ 20 & 2.34 \cdot 10^3 & 0.160 \\ 25 & 3.17 \cdot 10^3 & 0.246 \\ 30 & 4.24 \cdot 10^3 & 0.370 \\ 35 & 5.64 \cdot 10^3 & 0.553 \\ 40 & 7.37 \cdot 10^3 & 0.810 \\ 50 & 12.3 \cdot 10^3 & 1.69 \\ 60 & 19.9 \cdot 10^3 & 3.37 \\ 70 & 31.2 \cdot 10^3 & 6.43 \\ 80 & 47.3 \cdot 10^3 & 11.9 \\ 90 & 70.1 \cdot 10^3 & 21.1 \\ 100 & 101.3 \cdot 10^3 & 36.4 \\ 110 & 143.2 \cdot 10^3 & 61.0 \\ 120 & 198.4 \cdot 10^3 & 99.4 \\ 130 & 270.0 \cdot 10^3 & 158.1 \\ 150 & 476.0 \cdot 10^3 & 374.0 \cdot 10^3 \\ 200 & 1.55 \cdot 10^6 & 2.30 \cdot 10^3 \\ 250 & 3.97 \cdot 10^6 & 9.92 \cdot 10^3 \\ 300 & 8.59 \cdot 10^6 & 32.9 \cdot 10^3 \\ 350 & 16.5 \cdot 10^6 & 89.7 \cdot 10^3 \\ 374 & 22.1 \cdot 10^6 & 137.0 \cdot 10^3 \\ 400 & - & 210.0 \cdot 10^3 \\ \hline \end{array}

Length Expansion Coefficient

Substanceα/(10−6K−1)Substanceα/(10−6K−1)Aluminum23Glass (typical value)6.0Silver19Tungsten4.3Brass19Marble(typical value)2.5Copper17Invar2.0Iron12Graphite2.0Steel11Diamond1.2Platinum9.0Quartz0.4\def\arraystretch{1.5} \begin{array}{|cc|cc|} \hline \textup{Substance} & \alpha/(10^{-6}\textup{K}^{-1}) & \textup{Substance} & \alpha/(10^{-6}\textup{K}^{-1}) \\ \hline \textup{Aluminum} & 23 & \textup{Glass (typical value)} & 6.0 \\ \textup{Silver} & 19 & \textup{Tungsten} & 4.3 \\ \textup{Brass} & 19 & \textup{Marble(typical value)} & 2.5\\ \textup{Copper} & 17 & \textup{Invar} & 2.0\\ \textup{Iron} & 12 & \textup{Graphite} &2.0\\ \textup{Steel} & 11 & \textup{Diamond} & 1.2\\ \textup{Platinum} & 9.0 & \textup{Quartz} & 0.4 \\ \hline \end{array}

Resistivity for Common Conductive Materials

Substanceρ/(10−8Ωm)Substanceρ/(10−8Ωm)Silver1.59Iron10.0Copper1.68Platinum10.6Gold2.44Constantan49.0Aluminum2.82Stainless Steel69.0Tungsten5.60Nichrome120\def\arraystretch{1.5} \begin{array}{|cc|cc|} \hline \textup{Substance} & \rho/(10^{-8}\Omega\textup{m}) & \textup{Substance} & \rho/(10^{-8}\Omega\textup{m}) \\ \hline \textup{Silver} & 1.59 & \textup{Iron} & 10.0\\ \textup{Copper} & 1.68 & \textup{Platinum} & 10.6\\ \textup{Gold} & 2.44 & \textup{Constantan} & 49.0\\ \textup{Aluminum} & 2.82 & \textup{Stainless Steel} & 69.0\\ \textup{Tungsten} & 5.60 & \textup{Nichrome} & 120 \\ \hline \end{array}

Volume Expansion Coefficient

Substanceβ/(10−6K−1)Substanceβ/(10−6K−1)Acetone1490Glycerine500Gasoline950Water210Ethanol750Mercury180\def\arraystretch{1.5} \begin{array}{|cc|cc|} \hline \textup{Substance} & \beta/(10^{-6}\textup{K}^{-1}) & \textup{Substance} & \beta/(10^{-6}\textup{K}^{-1}) \\ \hline \textup{Acetone} & 1490 & \textup{Glycerine} & 500 \\ \textup{Gasoline} & 950 & \textup{Water} & 210 \\ \textup{Ethanol} & 750 & \textup{Mercury} & 180 \\ \hline \end{array}

Density

Solid Substanceρ/(103kg/m3)Fluidρ/(103kg/m3)Aluminum2.70Acetone0.79Lead11.3Blood1.06Gold19.3Ethanol0.79Iron7.87Ether0.72Copper8.93Glycol1.12Platinum21.5Mercury13.6Silver10.5Water1.00Tungsten19.3Vinegar1.12\def\arraystretch{1.5} \begin{array}{|cc|cc|} \hline \textup{Solid Substance} & \rho/(10^3 \textup{kg/m}^3) & \textup{Fluid} & \rho/(10^3 \textup{kg/m}^3)\\ \hline \textup{Aluminum} & 2.70 & \textup{Acetone} & 0.79 \\ \textup{Lead} & 11.3 & \textup{Blood} & 1.06 \\ \textup{Gold} & 19.3 & \textup{Ethanol} & 0.79 \\ \textup{Iron} & 7.87 & \textup{Ether} & 0.72 \\ \textup{Copper} & 8.93 & \textup{Glycol} & 1.12 \\ \textup{Platinum} & 21.5 & \textup{Mercury} & 13.6 \\ \textup{Silver} & 10.5 & \textup{Water} & 1.00 \\ \textup{Tungsten} & 19.3 & \textup{Vinegar} & 1.12 \\ \hline \end{array}

Specific Heat Capacity

Solid Substancec/(kJ kg−1K−1)Fluidc/(kJ kg−1K−1)Aluminum0.90Water4.19Marble0.88Sea Water3.90Porslin0.84Ether3.72Glas (typical value)0.83Methanol2.55Iron0.44Ethanol2.49Copper0.39Glycol2.39Brass0.38Vinegar2.06Silver0.24Olive Oil1.97Tungsten0.14Mercury0.14\def\arraystretch{1.5} \begin{array}{|cc|cc|} \hline \textup{Solid Substance} & c/(\textup{kJ kg}^{-1}\textup{K}^{-1}) & \textup{Fluid} & c/(\textup{kJ kg}^{-1}\textup{K}^{-1})\\ \hline \textup{Aluminum} & 0.90 & \textup{Water} & 4.19 \\ \textup{Marble} & 0.88 & \textup{Sea Water} & 3.90 \\ \textup{Porslin} & 0.84 & \textup{Ether} & 3.72 \\ \textup{Glas (typical value)} & 0.83 & \textup{Methanol} & 2.55 \\ \textup{Iron} & 0.44 & \textup{Ethanol} & 2.49 \\ \textup{Copper} & 0.39 & \textup{Glycol} & 2.39 \\ \textup{Brass} & 0.38 & \textup{Vinegar} & 2.06 \\ \textup{Silver} & 0.24 & \textup{Olive Oil} & 1.97 \\ \textup{Tungsten} & 0.14 & \textup{Mercury} & 0.14 \\ \hline \end{array}

Viscosity

Fluidη/(10−3Pa⋅s)Gasη/(10−6Pa⋅s)Glycerine1480Oxygen20.2Engine Oil1000Helium19.4Mercury1.55Air18.4Ethanol1.20Nitrogen Gas17.6Water1.00Carbon Dioxide14.8Acetone0.32Hydrogen Gas8.7\def\arraystretch{1.5} \begin{array}{|cc|cc|} \hline \textup{Fluid} & \eta/(10^{-3}\textup{Pa}\cdot\textup{s}) & \textup{Gas} & \eta/(10^{-6}\textup{Pa}\cdot\textup{s})\\ \hline \textup{Glycerine} & 1480 & \textup{Oxygen} & 20.2 \\ \textup{Engine Oil} & 1000 & \textup{Helium} & 19.4 \\ \textup{Mercury} & 1.55 & \textup{Air} & 18.4 \\ \textup{Ethanol} & 1.20 & \textup{Nitrogen Gas} & 17.6 \\ \textup{Water} & 1.00 & \textup{Carbon Dioxide} & 14.8 \\ \textup{Acetone} & 0.32 & \textup{Hydrogen Gas} & 8.7 \\ \hline \end{array}

Specific Melting Heat and Steam Generating Heat, Meting Point and Boiling Point

SubstanceIS/(kJ/kg)Melting Point/°CIa˚/(kJ/kg)Boiling Point/°CHelium21−269Nitrogen Gas26−210200−196Oxygen Gas14−218210−183Methane17−182130−161Ethanol105−11484178Ether113−11637735Mercury12−39293357Water33302260100Sodium113984200892Lead233288601744Aluminum398660105002467Platinum101176923703827\def\arraystretch{1.5} \begin{array}{|c|cccc|} \hline \textup{Substance} & I_S/(\textup{kJ/kg}) & \textup{Melting Point/°C} & I_\textup{å}/(\textup{kJ/kg}) & \textup{Boiling Point/°C} \\ \hline \textup{Helium} & & & 21 & -269 \\ \textup{Nitrogen Gas} & 26 & -210 & 200 & -196 \\ \textup{Oxygen Gas} & 14 & -218 & 210 & -183 \\ \textup{Methane} & 17 & -182 & 130 & -161 \\ \textup{Ethanol} & 105 & -114 & 841 & 78 \\ \textup{Ether} & 113 & -116 & 377 & 35 \\ \textup{Mercury} & 12 & -39 & 293 & 357 \\ \textup{Water} & 333 & 0 & 2260 & 100 \\ \textup{Sodium} & 113 & 98 & 4200 & 892 \\ \textup{Lead} & 23 & 328 & 860 & 1744 \\ \textup{Aluminum} & 398 & 660 & 10500 & 2467 \\ \textup{Platinum} & 101 & 1769 & 2370 & 3827 \\ \hline \end{array}

Constants in Van der Waal's Equation and Molecule Radii

GasChemical Namea/(10−2Pam6mol−2)b/(10−5m3mol−1)r/(10−10m)AmmoniaNH342.13.711.54ArgonAr13.63.221.47HeliumHe0.3452.371.33Carbon DioxideCO236.34.271.62Carbon MonoxideCO15.03.991.58KryptonKr23.43.981.58MercuryHg81.71.701.19Nitrogen GasN214.03.941.57Oxygen GasO213.73.181.47Water VaporH2O55.23.051.45Hydrogen GasH22.472.661.38XenonXe42.45.111.72\def\arraystretch{1.5} \begin{array}{|c|cccc|} \hline \textup{Gas} & \textup{Chemical Name} & a/(10^{-2}\textup{Pam}^6\textup{mol}^{-2}) & b/(10^{-5}\textup{m}^3\textup{mol}^{-1}) & r/(10^{-10}\textup{m}) \\ \hline \textup{Ammonia} & \textup{NH}_3 & 42.1 & 3.71 & 1.54 \\ \textup{Argon} & \textup{Ar} & 13.6 & 3.22 & 1.47 \\ \textup{Helium} & \textup{He} & 0.345 & 2.37 & 1.33 \\ \textup{Carbon Dioxide} & \textup{CO}_2 & 36.3 & 4.27 & 1.62 \\ \textup{Carbon Monoxide} & \textup{CO} & 15.0 & 3.99 & 1.58 \\ \textup{Krypton} & \textup{Kr} & 23.4 & 3.98 & 1.58 \\ \textup{Mercury} & \textup{Hg} & 81.7 & 1.70 & 1.19 \\ \textup{Nitrogen Gas} & \textup{N}_2 & 14.0 & 3.94 & 1.57 \\ \textup{Oxygen Gas} & \textup{O}_2 & 13.7 & 3.18 & 1.47 \\ \textup{Water Vapor} & \textup{H}_2\textup{O} & 55.2 & 3.05 & 1.45 \\ \textup{Hydrogen Gas} & \textup{H}_2 & 2.47 & 2.66 & 1.38 \\ \textup{Xenon} & \textup{Xe} & 42.4 & 5.11 & 1.72 \\\hline \end{array}

Triple Point

SubstanceNameTT/KpT/kPaAmmoniaNH3195.46.07Carbon DioxideCO2216.55517Nitrogen GasN263.1812.5NeonNe24.56432Oxygen GasO254.360.152WaterH2O273.160.610Hydrogen GasH213.807.04\def\arraystretch{1.5} \begin{array}{|c|ccc|} \hline \textup{Substance} & \textup{Name} & T_\textup{T}/\textup{K} & p_\textup{T}/\textup{kPa} \\ \hline \textup{Ammonia} & \textup{NH}_3 & 195.4 & 6.07 \\ \textup{Carbon Dioxide} & \textup{CO}_2 & 216.55 & 517 \\ \textup{Nitrogen Gas} & \textup{N}_2 & 63.18 & 12.5 \\ \textup{Neon} & \textup{Ne} & 24.56 & 432 \\ \textup{Oxygen Gas} & \textup{O}_2 & 54.36 & 0.152 \\ \textup{Water} & \textup{H}_2\textup{O} & 273.16 & 0.610 \\ \textup{Hydrogen Gas} & \textup{H}_2 & 13.80 & 7.04 \\ \hline \end{array}