Thermodynamics ...

Standard enthalpies of formation of CO₂ (g), CO (g), N₂O (g) and NO₂(g) in kJ/mol are -393, -110, 81 and 34, respectively. What is the value of  ∆H (in kJ) in the following reaction?

2NO₂ (g) + 3CO (g) → N₂O (g) + 3CO₂ (g)

In the following question, there are two statements, Assertion (A) and Reason (R). Consider both the statements independently and mark your answer.

Assertion (A): There is a natural asymmetry between converting work to heat and converting heat to work.
Reason (R): It is impossible for a system to undergo a cyclic process whose sole effects are the flow of heat into the system from a heat reservoir and the performance of an equal amount of work by the system on the surroundings.

Gibbs combined the first and second laws of thermodynamics and gave a thermodynamic function 'G', which gets affected by

(a) the change in the enthalpy of the system
(b) the change in the entropy of the system
(c) the temperature of the system

Identify the correct statement for change of Gibbs energy for a system (∆G_system) at a constant temperature and pressure.

Match the columns: