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If 2 kcal, of heat is supplied to a syst...

If 2 kcal, of heat is supplied to a system cause to change the internal energy of a gas is 5030 J, and external work done is 3350 J, then what is mechanical equivalent of heat?

A

41.90 J/kcal

B

4190 J/cal

C

4.19 J/kcal

D

4.19 J/cal

Text Solution

Verified by Experts

The correct Answer is:
D
`dQ=2kcal,du=5030J,dw=3350J,J=?`
`dQ=du+dw`
`JdQ=5030+3350`
`J=(8380)/(2)`
`J=4190J//kcal`.
`J=4.190J//cal`.
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