Areversible carnot engine has an efficiency of 30% and it operates between a heat source maintained at t 1 , and a refrigerator maintained at 210 k. find the temperature of the heat source.

To solve this problem we will apply the concepts related to the thermal efficiency given in an engine of the Carnot cycle. Here we know that efficiency is given under the equation

Where,

Temperature of Cold Body

Temperature of Hot Body

= Efficiency

According to the statement our values are:

Replacing we have that

Therefore the temperature of the heat source is 300K

conservation of mass

mass before something happens = mass afterwards