ASSIGNMENT ON THERMODYNAMICS (11th)

IMPORTANT QUESTIONS OF THERMODYNAMICS 

 1. Kelvin temperature of an ideal black body is doubled, what will be the effect on energy radiated by it?

 2. Is the enthalpy of neutralization of HCl is same as that of H2S04? If so, why?

 3. Enthalpy of neutralization of CH3COOH and NaOH is 55.9 kJ. What is the value of ΔH for ionization of CH3COOH? 

4. Why most of the exothermic processes (reactions) are spontaneous? 

5. What would be the heat released when 0.35 mol of HC1 in solution is neutralized by 0.25 mol of NaOH solution?

 6. Find the value of the equilibrium constant for the following conversion reaction at 298 K. Δr Gθ = – 13.6 kJ mol-1.

 7. Define Hess’s Law of Constant Heat Summation. 

8. Calculate the maximum work obtained when 0.75 mol of an ideal gas expands isothermally and reversible at 27°C from a volume of 15 L to 25 L. 

9. How will you arrive at the relationship q at constant pressure = q at constant volume + ΔngRT?

 10. Calculate the standard entropy change for the reaction X ⇌ Y if the value of ΔH° = 28.40 kJ and equilibrium constant is 1.8 × 10-7 at 298 K and ΔrG° = 38.484 kJ. 

 11. Calculate the enthalpy of formation of methane, given that the enthalpies of combustion of methane, graphite, and hydrogen are 890.2 kJ, 393.4 kJ, and 285.7 kJ mol-1 respectively.