2nd law and Carnot cycle

Apply the 1st law to each stage of the Carnot cycle.Understand why a heat engine needs to lose heat so that the work done by the gas is more than the work done on the gas.Apply the 1st law to the reverse Carnot cycle.Understand why work needs to be done to move thermal energy from a cold source to a hot one.Understand why energy always tends to spread out.Understand why an isothermal process is impossible.State the 2nd...

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