Question

What would be the work done on/by the system if the internal energy of the system falls by 100 joules even when 200 joules of heat is supplied to it?​

Answer 1

Answer:

dQ = 300 J

Explanation:

We have to calculate the work done on/by the system if the internal energy of the system falls by 100 joules even when 200 joules of heat is supplied to it.

Solution:

By sign convention,

dQ = du + dw .......... (1)

du = 200 J ( ∵Heat absorbed is positive )

dw = - 100 J ( ∵Heat given out is negative )

Substitute these values in (1):

dQ = 200 - (-100)

dQ = 200 + 100

dQ = 300 J

Thanks.