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Molar and Specific Heat Capacity

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Question

Calculate the number of kJ of heat necessary to raise the temperature of 60.0 g of aluminium from $35^{\circ} C$ to $55^{\circ} C$ . Molar heat capacity of Al is $24 J m o l^{- 1} K^{- 1}$

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Solution

From the expression of heat (q),
q = m. c. $Δ T$ Where,
c = molar heat capacity m
= mass of substance
$Δ T$ = change in temperature
Substituting the values in the expression of q:
$q = (\frac{60}{27} m o l) (24 J m o l^{- 1} K^{- 1}) (20 K) q = 1066.7 J q = 1.07 k J$

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Molar and Specific Heat Capacity

Standard XII Chemistry

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