1
MHT CET 2021 24th September Evening Shift
+1
-0

For isochoric process, the first law of thermodynamics can be expressed as

A
$$\Delta \mathrm{U}=\mathrm{Q}_{\mathrm{V}}$$
B
$$\mathrm{-\Delta U=Q-P \Delta V}$$
C
$$\mathrm{-\Delta U=-W}$$
D
$$\mathrm{W}=-\mathrm{Q}$$
2
MHT CET 2021 24th September Evening Shift
+1
-0

When certain volume of gas expands against a constant external pressure of $$2.40 \times 10^5 \mathrm{~Pa}$$ at 300 $$\mathrm{K}$$ to $$2.2 \times 10^{-3} \mathrm{~m}^3$$. If the work obtained is $$-0.048 \mathrm{~kJ}$$. What is the initial volume of the gas?

A
$$2 \times 10^{-3} \mathrm{~m}^3$$
B
$$4.5 \times 10^{-2} \mathrm{~m}^3$$
C
$$1.5 \times 10^{-3} \mathrm{~m}^3$$
D
$$2.8 \times 10^{-2} \mathrm{~m}^3$$
3
MHT CET 2021 24th September Evening Shift
+1
-0

What is internal energy change when $$62 \mathrm{~J}$$ of work is done on the system and $$128 \mathrm{~J}$$ of heat is transferred to surrounding?

A
$$-62 \mathrm{~J}$$
B
$$-190 \mathrm{~J}$$
C
$$-128 \mathrm{~J}$$
D
$$-66 \mathrm{~J}$$
4
MHT CET 2021 24th September Morning Shift
+1
-0

A gas is allowed to expand against a constant external pressure of 2.5 bar from an initial volume 'x' L to final volume of 4.5 L. If amount of work done is 5 dm$$^3$$ bar, what is the value of 'x'?

A
2.5 L
B
4.5 L
C
6.0 L
D
1.2 L
EXAM MAP
Medical
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