Purchase Solution

Enthalpy and ratio of slopes and graph

Not what you're looking for?

Ask Custom Question

1. Consider the phase change:
C(graphite) <---> C(diamond)
Given that delta_rG^o/Jmol^-1 = 1895 + 3.363T, calculate the enthalpy and entropy. Calculate the pressure at which diamond and graphite are in equilibrium with each other at 25 degree Celsius. Take the density of diamond and graphite to be 3.51 g/cm^3 and 2.25 g/cm^3, respectively. Assume that both diamond and graphite are in-compressible.

2. a. The vapor pressure of solid and liquid hydrogen iodide can be expressed empirically as
ln(P/torr) = -2906K/T + 19.020
ln(P/torr) = -2595.7K/T + 17.572
calculate the ratio of the slopes of the solid-gas curve and the liquid-gas curve at the triple point.
b. Given that the normal melting point, critical temperature, and the critical pressure of hydrogen iodide are 222K, 424 K, and 82.0 atm, respectively, use the data in part a is sketch the phase diagram of hydrogen iodide.

Purchase this Solution

Solution Summary

The enthalpy and entropy are calculated for T-dependent equations. The ratio of slopes from Clausiuis-Clayperon equations and phase diagrams are explained.

Purchase this Solution

Free BrainMass Quizzes

The quiz helps in revising basic concepts about thermochemistry.

Match Elements with their Symbols

Elements are provided: choose the matching one- or two-letter symbol for each element.

General Chemistry - Classification of Matter

This test will assess your knowledge on the classification of matter which includes elements, compounds and mixtures.

Functional groups in Organic Chemistry

You will be tested on the names of functional groups in Organic Chemistry. It is very important to know the functional groups to understand Organic reactions.