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Experiment 1.When the two containers are...

Experiment 1.When the two containers are weighed, `@_A = 225 g, W = 160 g` and mass of evacuated container `W_C = 100 g`.
Experiment 2.When the two containers are given same amount of heat, same temperature rise is recorded. The pressure change found are
`Delta P_A = 2.5 atm, Delta P_B = 1.5 atm`

What is the internal energy for Gas A at a temperature T=300K?

A

`1406.25`cal

B

`1000 `cal

C

`2812.5` cal

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
C
Internal energy at any temperature T
`n fRT//2`
`=((125)/(40))((3R)/2)(300)" "[because"f for monoatomic gas = 3"]`
`rArr " "U_i =" 2812.5 cal"`
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