Use the molar constant volume heat capacities for gases given in Topic 4C (as multiples for R) to estimate the change in reaction enthalpy of N2 (g) + 3 H2 (g) ---> 2 NH3 (g) when the temperture is increased from 300. K to 500. K. Ignore the vibrational contributions to heat capacity. Is the reaction more or less exothermic at the higher temperature?
Atoms | Linear Molecules | Nonlinear Molecules | |
Cv,m | 3/2 R | 5/2 R | 3 R |
Cp,m | 5/2 R | 7/2 R | 4 R |
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