In a process 701 j of heat is absorbed

Asked by admin @ in Chemistry viewed by 285 People

(a) In a process, 701 J of heat is absorbed by a system and 394 J of work is

done by the system. What is the change in internal energy for the process? (b) Calculate the internal energy change when the system absorbs 5 KJ of heat and 1KJ of work

Answered by admin @


Explanation:

ΔU = Q - W (First law  of thermodynamics)

ΔU =  internal energy change

Q = heat absorbed by the system

W = Work done by the system

a) Q = 701 J , W = 394 J

ΔU = ?

ΔU = Q - W = 701 J - 394 J = 307 J

307 Joules is the change in internal energy for the process.

b) Q = 5 kJ = 5000J , W = 1kJ = 1000 J

ΔU = ?

ΔU = Q - W = 5000 J - 1000 J = 4000 J = 4 kJ

4 kilo Joules is the change in internal energy for the process.


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