1
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0
0.4 g of Propane burns completely at 300 K in a bomb calorimeter. The temperature of the calorimeter and surrounding water rises by $0.4^0 \mathrm{C}$. If the heat capacity of the calorimeter and contents is $24 \mathrm{~kJ} \mathrm{~K}^{-1}$ what is the Enthalpy for the reaction? (Assume that propane gas shows ideal behaviour).
A
$-$1006.9 kJ
B
$-$1063.5 kJ
C
$-$2084.6 kJ
D
$-$1902.8 kJ
2
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0
For a reaction $\mathrm{X}_2(\mathrm{l})+\mathrm{Y}_2(\mathrm{~g}) \leftrightharpoons 2 \mathrm{XY}(\mathrm{g})$, the $\Delta \mathrm{H}^0$ and $\Delta \mathrm{S}^0$ are $+29.3 \mathrm{~kJ} / \mathrm{mol}$ and $104.1 \mathrm{~J} \mathrm{~K}^{-1} \mathrm{~mol}^{-1}$ respectively at 298 K . Find the free energy change in $\mathrm{kJ} / \mathrm{mol}$.
A
0.6
B
2.04
C
5.2
D
1.72
3
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0
Given that the standard enthalpy of combustion of $\mathrm{C}_{(\mathrm{S})}$ and $\mathrm{CS}_2(\mathrm{l})$ are -393.3 and $-1108.76 \mathrm{~kJ} / \mathrm{mol}$ respectively and the standard enthalpy of formation of $\mathrm{CS}_2$ is $128.02 \mathrm{~kJ} / \mathrm{mol}$. What is $\Delta H_f^0$ of $\mathrm{SO}_2$ ?
A
$-510.6 \mathrm{~kJ} / \mathrm{mol}$
B
$-293.72 \mathrm{~kJ} / \mathrm{mol}$
C
$-321.2 \mathrm{~kJ} / \mathrm{mol}$
D
$-587 \mathrm{~kJ} / \mathrm{mol}$
4
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0

The Enthalpy of combustion of $$\mathrm{C}_6 \mathrm{H}_5 \mathrm{COOH}(\mathrm{s})$$ at $$25^{\circ} \mathrm{c}$$ and 1.0 atm pressure is $$-2546 \mathrm{~kJ} / \mathrm{mol}$$. What is the Internal energy change for this reaction?

A
$$ -2544.8 \mathrm{~kJ} $$
B
$$ -2539.8 \mathrm{~kJ} $$
C
$$ -2560.3 \mathrm{~kJ} $$
D
$$ -2552.2 \mathrm{~kJ} $$
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