Theromodynamics...

Which of the following is an extensive property of a system?

Which of the following are state functions?

P. Entropy

Q. Heat

R. Internal energy

S. Work

Which of the following statements is correct according to the first law of thermodynamics?

When 1 mole of a gas is heated at constant volume, temperature is raised from 298 to 308 K. If heat supplied to the gas is 500 J, then which of the following statements is correct?

Which of the following are not observed in a reaction where heat is evolved (exothermic)?

(a) Change in internal energy is positive.
(b) Change in internal energy is negative.
(c) Enthalpy of the reaction is negative.
(d) Enthalpy of the reaction is positive.

Given: 

NH₃(g) ΔH_f^o = - 46 kJ mol^-1 

NO₂(g) ΔH_f^o = + 34 kJ mol^-1 

H₂O(g) ΔH_f^o = - 242 kJ mol^-1 

O₂(g) ΔH_f^o = 0 kJ mol^-1 

Calculate the standard enthalpy of reaction for the oxidation of ammonia gas to produce nitrogen dioxide gas and water vapours.

The second law of thermodynamics states about a perpetual machine. Which of the following statements is/are false regarding a perpetual machine?

In which of the following conversions will the value of Δ S be negative?