1
MHT CET 2023 9th May Morning Shift
+1
-0

Calculate the value of $$\Delta G$$ for following reaction at $$300 \mathrm{~K}$$.

\begin{aligned} & \mathrm{H}_2 \mathrm{O}_{(\mathrm{s})} \longrightarrow \mathrm{H}_2 \mathrm{O}_{(l)} \\ & \left(\Delta \mathrm{H}=7 \mathrm{~kJ}, \Delta \mathrm{S}=24.8 \mathrm{~J} \mathrm{~K}^{-1}\right) \end{aligned}

A
$$0.74 \mathrm{~kJ} \mathrm{~mol}^{-1}$$
B
$$-0.82 \mathrm{~kJ} \mathrm{~mol}^{-1}$$
C
$$0.21 \mathrm{~kJ} \mathrm{~mol}^{-1}$$
D
$$-0.44 \mathrm{~kJ} \mathrm{~mol}^{-1}$$
2
MHT CET 2021 21th September Evening Shift
+1
-0

When 1 mole of gas is heated at constant volume, the temperature rises form $$273 \mathrm{~K}$$ to $$546 \mathrm{~K}$$. If heat supplied to the gas is $$\mathrm{x~J}$$, then find the correct statement from following.

A
$$Q=\Delta U=x J, W=0$$
B
$$\mathrm{Q}=\mathrm{W}=\mathrm{x} \mathrm{J}, \Delta \mathrm{V}=0$$
C
$$\Delta V=0, Q=W=-x J$$
D
$$\mathrm{Q}=-\mathrm{W}=\mathrm{x} J, \Delta \mathrm{V}=0$$
3
MHT CET 2021 21th September Evening Shift
+1
-0

What is the value of $$\mathrm{\Delta H-\Delta U}$$ for the formation of 2 moles of ammonia from $$\mathrm{H_{2(g)}}$$ and $$\mathrm{N_{2(g)}}$$ ?

A
$$\mathrm{-\frac{RT}{2}}$$
B
$$\mathrm{\frac{RT}{2}}$$
C
$$-$$2RT
D
2RT
4
MHT CET 2021 21th September Evening Shift
+1
-0

Two moles of an ideal gas are expanded isothermally from $$15 \mathrm{dm}^3$$ to $$20 \mathrm{dm}^3$$. If the amount of work done is $$-6 \mathrm{dm}^{-3}$$ bar, find external pressure needed to obtain this work.

A
$$1.2 \times 10^5 \mathrm{~Pa}$$
B
$$3.2 \mathrm{~Pa}$$
C
$$8.1 \times 10^4 \mathrm{~Pa}$$
D
$$2.4 \mathrm{~Pa}$$
MHT CET Subjects
Physics
Mechanics
Optics
Electromagnetism
Modern Physics
Chemistry
Physical Chemistry
Inorganic Chemistry
Organic Chemistry
Mathematics
Algebra
Trigonometry
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