300 cal. of heat is given to a heat engine and it rejects 225 cal. If source temperature is 227$^\circ$C, then the temperature of sink will be ______________ $^\circ$C.
Answer (integer)
102
Solution
<p>$\eta = {W \over Q} = {{300 - 225} \over {300}}$</p>
<p>$\Rightarrow {{75} \over {300}} = 1 - {{{T_L}} \over {{T_H}}}$</p>
<p>$\Rightarrow {T_L} = {3 \over 4}\,{T_H} = {3 \over 4}(500) = 375\,K$</p>
<p>$\Rightarrow {T_L} = 102^\circ C$</p>
About this question
Subject: Physics · Chapter: Thermodynamics · Topic: Zeroth and First Law
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