A) \[2.5{}^\circ C\]
B) \[3.0{}^\circ C\]
C) \[7.5{}^\circ C\]
D) \[10{}^\circ C\]
Correct Answer: C
Solution :
\[{{m}_{w}}=0.003\,kg/s,\,{{m}_{a}}=1\,kg/s,\] \[{{c}_{pa}}\,\,=\,\,1kJ/kg.K,\,{{h}_{fg}}\,\,=\,\,2500kJ/kg,\] \[{{m}_{a}}\times {{c}_{pa}}\times \Delta t={{m}_{w}}\times {{h}_{fg}}\] \[1\times 1\times \Delta t=0.003\times 2500\] \[\Delta t=7.5{}^\circ C\]
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