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Standard XII

Physics

Heat Capacity

A gas is comp...

Question

A gas is compressed at a constant pressure of $50 N / m^{2}$ from a volume of $10 m^{3}$ to a volume of $4 m^{3}$ .Energy of 100J then added to the gas by heating.Its internal energy is

Increased by 400 J

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Increased by 200 J

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Increased by 100 J

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Decreased by 200 J

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Solution

The correct option is A
Increased by 400 J

From FLOT $△ Q = △ U + △ W = △ U + P △ V$

$\Rightarrow 100 = △ U + 50 \times (4 - 10) \Rightarrow △ U = 400 J$

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A gas is compressed at a constant pressure of 50N/m2 from a volume of 10m3 to a volume of 4m3.Energy of 100J then added to the gas by heating.Its internal energy is

The correct option is A Increased by 400 J From FLOT △Q=△U+△W=△U+P△V ⇒100=△U+50×(4−10)⇒△U=400J

A gas is compressed at a constant pressure of $50 N / m^{2}$ from a volume of $10 m^{3}$ to a volume of $4 m^{3}$ .Energy of 100J then added to the gas by heating.Its internal energy is

The correct option is A
Increased by 400 J

From FLOT $△ Q = △ U + △ W = △ U + P △ V$

$\Rightarrow 100 = △ U + 50 \times (4 - 10) \Rightarrow △ U = 400 J$