Thermodynamics MCQ Question with Answer

Question No : 22
On burning hydrogen in an atmosphere of chlorine, 1.65 gm of HC1 was obtained and 1 Kcal of heat was liberated. The heat of formation of HC1 should be ?

Question No : 23
10 gm of ice at 0°C is placed into 100 gm of water at 50°C. Hie temperature of water after the whole ice has melted will be

Question No : 24
In a spontaneous irreversible process, the total entropy of the system & its surroundings

Question No : 25
For a reaction $$\begin{gathered} 2 S{O}_2\left(g\right)+O_2\left(g\right)\to 2 S{O}_3; \\ \left(g\right)∆G°=-141.8 K{J}^{-1} \end{gathered}$$
So the driving force for the reaction is?

Question No : 26
Heat of combustion of S (Rhombic) and S (monoclinic) are -297.5 KJ and -300 KJ $mol{e}^{-1}$ respectively. So the heat of transformation of SR to SM is

Question No : 27
The molar entropy of vaporisation of a liquid at its boiling point is

Question No : 28
35.5 gm of chlorine gas is allowed to expand freely in vacuum at 25°C. Then AH for this process is