Problem $07\mathrm{.}027$E$-$ Isothermal heat rejection process of Carnot cycle

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During the isothermal heat rejection process of a Carnot cycle, the working fluid experiences an entropy change of $0\mathrm{.}640$ Btu$/$R$.$ The temperature of the heat sink is $95$F$.$

The illustration shows a Carnot heat engine with an inward arrow marked on its inlet and the area next to it is labeled $95$ degrees Fahrenheit. An arrow labeled heat from $95$ degrees Fahrenheit points at sink $95$ degrees Fahrenheit.

Problem $07\mathrm{.}027$E$.$a $-$ Heat transfer to working fluid in a heat rejection process

Determine the amount of heat transfer.

The amount of heat transfer is $\_\_\_$Btu. Determine the entropy change of the sink.

The entropy change of the sink is $\_\_\_\_$Btu$/$R$.$ Determine the total entropy change for this process.

The total entropy change for this process is $\_\_\_$Btu$/$R$.$