MHT CET 2025 25th April Morning Shift | Thermodynamics Question 8 | Chemistry

Calculate the work done in joule if 1 mole of ideal gas is compressed from $25 \mathrm{dm}^3$ to $13 \mathrm{dm}^3$ at constant external pressure 4 bar.

2400 J

4800 J

6000 J

7200 J

MHT CET 2025 25th April Morning Shift

MCQ (Single Correct Answer)

-0

Which from following transformations is endothermic in nature?

$\mathrm{H}_2 \mathrm{O}_{(\ell)} \rightarrow \mathrm{H}_2 \mathrm{O}_{(\mathrm{s})}$

$\quad \mathrm{H}_2 \mathrm{O}_{(\mathrm{s})} \rightarrow \mathrm{H}_2 \mathrm{O}_{(\mathrm{\ell})}$

$\quad \mathrm{H}_2 \mathrm{O}_{(\mathrm{g})} \rightarrow \mathrm{H}_2 \mathrm{O}_{(\ell)}$

$\quad \mathrm{H}_2 \mathrm{O}_{(\mathrm{g})} \rightarrow \mathrm{H}_2 \mathrm{O}_{(\mathrm{s})}$

MHT CET 2025 23rd April Evening Shift

MCQ (Single Correct Answer)

-0

Calculate the standard enthalpy change for synthesis of ammonia gas from following data.

i. $\quad 2 \mathrm{H}_{2(\mathrm{~g})}+\mathrm{N}_{2(\mathrm{~g})} \longrightarrow \mathrm{N}_2 \mathrm{H}_{4(\mathrm{~g})} ; \Delta_{\mathrm{r}} \mathrm{H}_1^0=95.4 \mathrm{~kJ}$

ii. $\quad \mathrm{N}_2 \mathrm{H}_{4(\mathrm{~g})}+\mathrm{H}_{2(\mathrm{~g})} \longrightarrow 2 \mathrm{NH}_{3(\mathrm{~g})}$;$$ \Delta_{\mathrm{t}} \mathrm{H}_2^0=-187.6 \mathrm{~kJ} $$

-92.2 kJ

-46.1 kJ

-138.3 kJ

-283.2 kJ

MHT CET 2025 23rd April Evening Shift

MCQ (Single Correct Answer)

-0

Identify from following the correct set of thermodynamic conditions for the reaction to be spontaneous below equilibrium temperature.

$\Delta \mathrm{H}<0$ and $\Delta \mathrm{S}<0$

$\Delta \mathrm{H}>0$ and $\Delta \mathrm{S}>0$

$\Delta \mathrm{H}<0$ and $\Delta \mathrm{S}>0$

$\Delta \mathrm{H}>0$ and $\Delta \mathrm{S}<0$

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