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Question

Determine the heat energy needed to increase the temperature of 10.0 mol of mercury by 7.5 K. The value of heat capacity for given amount of mercury is 27.8 kJK1 
  1. 208.5 J
  2. 2085 J
  3. 208.5 kJ
  4. 2805 J


Solution

The correct option is C 208.5 kJ
We know Cm=QΔT JK
According to given data, 
=27.8=Q7.5
=Q=27.8×7.5
Q=208.5 kJ
Energy required to increase the temperature of 10 mol of mercury =208.5 kJ

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