Chemical Thermodynamics Quiz 4

Calculate the heat of reaction at 298 K for the reaction $C_2 H_{4 (g)} + H_{2 (g)} = C_2 H_{6(g)}$

Given that the heats of combustion of ethylene, hydrogen and ethane are 337.0, 68.4 and 373.0 kcal respectively.

Entropy change for a process is given by,

For a spontaneous process, total entropy change for a system and its surroundings is

For a system at equilibrium,

If the enthalpy of vaporisation of water at 100°C is 186.5 J·$mol^{-1}$ , the entropy of vaporization will be-

Heat of fusion of ice is 6.02kJmol-1 at 0 °C. If 100 g water is frozen at 0 °C, entropy change will be

If for a reaction $\Delta H$ is negative and $\Delta S$ is positive then the reaction is

Which of the following has highest entropy?

Gibbs free energy change at equilibrium is

For spontaneous process,