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Chemistry Question on Thermodynamics terms

No work is done on the system, but qq amount of heat is taken out from the system and given to the surroundings. Express the change in internal energy (ΔU)(\Delta U) of this system and what type of wall does the system have ?

A

ΔU=w\Delta U = w , wall is adiabatic

B

ΔU=q−w\Delta U = q - w , closed system

C

ΔU=−q\Delta U = - q , thermally conducting walls

D

ΔU=q\Delta U = q , thermally conducting walls

Answer

ΔU=−q\Delta U = - q , thermally conducting walls

Explanation

Solution

w=0w=0, the wall is thermally conducting Δ U=−q\Delta\, U=-q (exothermic process)