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Questions  

5 moles of hydrogen initially at STP are compressed adiabatically so that temperature becomes 400°C. Increase in the internal energy of the gas in kilo joules is:(take R=8.3 J/mol-K)

a
41.50
b
80.55
c
65.55
d
21.55

detailed solution

Correct option is A

∆U=nCV∆T

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100 mol of an ideal gas is heated from 10° to 20°C keeping its (i) volume constant (ii) pressure constant.
Let ΔUa and ΔUb denote the change in the internal energy of the gas due to process (i) and (ii),
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