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Thermodynamics (C) question bank (Chemistry)

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Q1.

Match List - I with List - II. Given $V_1$ and $V_2$ are initial and final volumes respectively.

List - I (Isothermal process)	List - II (Expression)
A. Reversible expansion	I. $q = 0$
B. Free expansion	II. $q = nRT \ln\dfrac{V_2}{V_1}$
C. Irreversible Compression	III. $w = -p_{ext}(V_1 - V_2)$
D. Cyclic reversible	IV. $\dfrac{q_{rev}}{T} = 0$

Choose the correct answer from the options given below :

(A)

A-II, B-III, C-I, D-IV

(B)

A-II, B-I, C-IV, D-III

(C)

A-II, B-I, C-III, D-IV

(D)

A-I, B-II, C-III, D-IV

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Q2.

Consider the reaction $X \rightleftharpoons Y$ at $300$ K. If $\Delta H^{\theta}$ and $K$ are $28.40$ kJ mol$^{-1}$ and $1.8 \times 10^{-7}$ at the same temperature, then the magnitude of $\Delta S^{\theta}$ for the reaction in J K$^{-1}$ mol$^{-1}$ is _______. (Nearest integer) (Given: $R = 8.3$ J K$^{-1}$ mol$^{-1}$, $\ln 10 = 2.3$, $\log 3 = 0.48$, $\log 2 = 0.30$)

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