3. Calculate the heat required to evaporate and heat 5 kilograms of a substance from its boiling point T1 to the final temperature T2=100°C, if the boiling point, the specific heat of vaporization ΔHevap and the temperature dependence of the heat capacity of the gaseous substance Cp in the range of specified temperatures are known.
Variant Substance Equation coefficients
CP=a bT cT2 c’T─2, J/(mol·K) T1,°C ΔHtest,
kJ/mol
a b•103 c•106 c'•10─5
1 СH3OH(g) 15.28 105.20 –31.04 - 64.5 37.57

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