A. 20 J
B. 80 J
C. 100 J
D. 140 J
The question was asked in quiz.
This interesting question is from Heat Capacity Equations topic in division Introduction to Energy Balances for Processes without Reaction and Calculation of Enthalpy Changes of Basic Chemical Engineering
For explanation: Enthalpy change is the area covered under CP-T curve = Area of rectangle = 20*(5 – 4) = 20 J.