0.2 kg of air is heated in a constant volume process from 20 to 100(degrees celsius). The specific heat at constant volume is 0.7186J/ Kg K. Calculate the change in entropy of this process.

Explanation:

The formula for calculating the change in  entropy of a process can be expressed as:

Given that:

mass m = 0.20 kg

specific heat constant c  =  0.7186J/ Kg K

= 100° C = ( 100 + 273.15) = 373.15 K

= 20° C = ( 20  + 273.15) = 293.15 K

Replacing our values into above equation; we have :

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