A) 4.2 kJ
B) 8.4 kJ
C) 84 kJ
D) 2.1 kJ
Correct Answer: B
Solution :
\[\Delta Q=MS\Delta T=100\times {{10}^{-3}}\times 4184\times 20=8.4\times {{10}^{3}}\] \[\Delta Q=84\,kJ\]and \[\Delta W=0\] \[\Delta Q=\Delta U+\Delta W\Rightarrow \Delta U=8.4\,kJ\] Hence, the correction option is (b).You need to login to perform this action.
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