1. The enthalpy of vaporization of methanol is 37.4 kJ/mol at 25°C. Molar heat capacities for liquid and gaseous methanol are 81.6 J/mol K and 43.9 J/mol·K respectively. Assume that heat capacities are the constant in this temperature range. Calculate the enthalpy of vaporization at 50 °C.

1. The enthalpy of vaporization of methanol is 37.4 kJ/mol at 25°C. Molar heat capacities for liquid and gaseous methanol are 81.6 J/mol K and 43.9 J/mol·K respectively. Assume that heat capacities are the constant in this temperature range. Calculate the enthalpy of vaporization at 50 °C.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter6: Thermochemistry

Section: Chapter Questions

Problem 21Q: The enthalpy of combustion of CH4(g) when H2O (1) is formed is 891 kJ/mol and the enthalpy of...

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The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).

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Question

1. The enthalpy of vaporization of methanol is 37.4 kJ/mol at
25°C. Molar heat capacities for liquid and gaseous methanol are
81.6 J/mol K and 43.9 J/mol·K respectively. Assume that heat
capacities are the constant in this temperature range. Calculate
the enthalpy of vaporization at
50 °C.

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