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Standard XII

Chemistry

Heat Capacity at Constant Volume

Determine the...

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 $27.8 k J K^{- 1}$

208.5 J

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2085 J

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208.5 kJ

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2805 J

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Solution

The correct option is C $208.5 kJ$
We know $C_{m} = \frac{Q}{Δ T} J K^{- 1}$
According to given data,
$= 27.8 = \frac{Q}{7.5}$
$\Rightarrow Q = 27.8 \times 7.5$
$\Rightarrow Q = 208.5 k J$
Energy required to increase the temperature of $10 mol$ of mercury $= 208.5 kJ$

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Heat Capacity at Constant Volume

Standard XII Chemistry

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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 kJK−1

The correct option is C 208.5 kJWe know Cm=QΔT JK−1 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

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 $27.8 k J K^{- 1}$

The correct option is C $208.5 kJ$
We know $C_{m} = \frac{Q}{Δ T} J K^{- 1}$
According to given data,
$= 27.8 = \frac{Q}{7.5}$
$\Rightarrow Q = 27.8 \times 7.5$
$\Rightarrow Q = 208.5 k J$
Energy required to increase the temperature of $10 mol$ of mercury $= 208.5 kJ$