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Heat Capacity

A diatomic ga...

Question

A diatomic gas does 80 J of work when expanded isobarically. Find the heat given to the gas during this process.

A

160 J

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B

200 J

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C

280 J

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D

320 J

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Solution

The correct option is C 280 J
$Δ Q = W + Δ U Δ Q = n R Δ T + \frac{f}{2} n R Δ T Δ Q = (\frac{f}{2} + 1) n R Δ T Δ Q = \frac{7}{2} \times 80 = 280 J$

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