Start Free Mock LoginAlready registered? Login here

Physics - Thermodynamics Question with Solution | TestHub

PhysicsThermodynamicsMiscellaneousMedium3 minQB

PhysicsMediuminteger

In a thermodynamic process, pressure of a fixed mass of a gas is changed in such a manner that the gas releases 20 J of heat and 8J of work is done on the gas. If initial internal energy of the gas was 30J, what will be the final internal energy (in J)?

Answer:

Solution:

First law: $Q = Δ U + W$ with $Q = - 20 J$ released and $W = - 8 J$ (work done on the gas).

$Δ U = - 20 + 8 = - 12 J$ , so $U_{f} = 30 - 12 = 18 J$ .

Stream:JEESubject:PhysicsTopic:ThermodynamicsSubtopic:Miscellaneous

⏱ 3mℹ️ Source: QB

Doubts & Discussion

Loading discussions...