Engineer & Medical

Thermodynamics (C) question bank (Chemistry)

Practice 1,702 free Engineer & Medical Chemistry - Thermodynamics (C) questions with answers and step-by-step solutions.

Q1.

Consider the reaction
$2\text{H}_2\text{S}(g) + 3\text{O}_2(g) \rightarrow 2\text{H}_2\text{O}(l) + 2\text{SO}_2(g)$
The magnitude of enthalpy change for the reaction in kJ mol$^{-1}$ is ________. (Nearest integer)
Given: $\Delta_fH^{\ominus}(\text{H}_2\text{S}) = -20.1$ kJ mol$^{-1}$
$\Delta_fH^{\ominus}(\text{H}_2\text{O}) = -286.0$ kJ mol$^{-1}$
$\Delta_fH^{\ominus}(\text{SO}_2) = -297.0$ kJ mol$^{-1}$

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Q2.

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 expansionI. $q = 0$
B. Free expansionII. $q = nRT \ln\dfrac{V_2}{V_1}$
C. Irreversible CompressionIII. $w = -p_{ext}(V_1 - V_2)$
D. Cyclic reversibleIV. $\dfrac{q_{rev}}{T} = 0$
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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