Question

Air undergoes a constant pressure process from 300K to 500K in a piston cylinder. Determine the heat transfer for this process in [kJ/kg). You may assume that air behaves as an ideal gas with constant specific heats.

Answer 1

200.1kJ/Kg

Step-by-step explanation:

To solve this problem we must apply the first law of thermodynamics, which indicates that the energy that enters a system is the same that must come out, resulting in the following equation

q=cp(T2-T1)

where

q= heat per unit mass

cp=specific heat for air=1.005KJ/(kgK)

Specific heat is a property of air that indicates how much the air temperature rises per unit of thermal energy

T2=temperature in state 2=500k

T1=temperature in state 1=300k

q=1.005(500-300K)=200.1kJ/Kg