NCERT Class XI Chemistry Thermodynamics Solutions
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Question : 9
Total: 22
Calculate the number of kJ of heat necessary to raise the temperature of 60.0 g of aluminium from 35°C to 55°C. Molar heat capacity of Al is 24 J m o l – 1 K – 1
Solution:
Mass of Al = 60 g
Rise in temperature, ΔT = 55 – 35 = 20°C
Molar heat capacity of Al = 24J m o l – 1 K – 1
Specific heat capacity of Al =
J g − 1 K − 1
∴ Energy required = m × c × ΔT = 60 ×
= 1.067 kJ or 1.07 kJ
Rise in temperature, ΔT = 55 – 35 = 20°C
Molar heat capacity of Al = 24
Specific heat capacity of Al =
∴ Energy required = m × c × ΔT = 60 ×
= 1.067 kJ or 1.07 kJ
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