Question

5 mole of oxygen is heated at constan volume from 10°C to 20°C . Find the change in internal energy of gas​

Answer 1

Answer:

R=8.31J mol raise to −1 deg raise to −1 = 4.188.31cal mol−1deg−1

=1.99cal mol−1deg−1

We know that CP−CV=R

or CV=CP−R=7.03−1.99=5.04cal mol−1deg−1

Heat absorbed by 5 mole of oxygen in heating from 10oC to 20oC

=5×CV×ΔT=5×5.04×10=252cal

Since, the gas is heated at constant volume, no external work is done,

i.e., w=0

So, change in internal energy will be equal to heat absorbed,

ΔU=q+w=252+0=252cal

Explanation:

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