Q. 94.2( 49 Votes )

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 mol–1 K–1.

Answer :

We Know that,

Q = ncΔT


Where n is number of mole of substance


c is molar heat capacity of substance


ΔT is rise in temperature


Given,


c = 24 J mol-1 K-1


ΔT = 55 – 35 = 20°C = 20 K


m = 60 g


number of mole of Aluminium in m gram is given as


n = m/M


Where M is molar mass of aluminium.


n = 60/27 = 2.22


Thus Q = ncΔT


= (2.22 mol)×(24 J mol–1 K–1)×(20K)


= 1065.6 J


= 1.065 kJ


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Calorimetry - 02 | Mastering important conceptsCalorimetry - 02 | Mastering important conceptsCalorimetry - 02 | Mastering important concepts39 mins
Thermal Properties of Matter | Matering important conceptsThermal Properties of Matter | Matering important conceptsThermal Properties of Matter | Matering important concepts48 mins
Entropy | Rapid QuizEntropy | Rapid QuizEntropy | Rapid Quiz45 mins
Heat Transfer -02 | Mastering important conceptsHeat Transfer -02 | Mastering important conceptsHeat Transfer -02 | Mastering important concepts49 mins
Enthalpy of NeutralisationEnthalpy of NeutralisationEnthalpy of Neutralisation40 mins
Enthalpy of combustion | Mastering important conceptsEnthalpy of combustion | Mastering important conceptsEnthalpy of combustion | Mastering important concepts44 mins
Kinetic Theory of GasesKinetic Theory of GasesKinetic Theory of Gases46 mins
Thermodynamics | Types of EnthalpyThermodynamics | Types of EnthalpyThermodynamics | Types of Enthalpy66 mins
Hess LawHess LawHess Law61 mins
An interesting lecture on EntropyAn interesting lecture on EntropyAn interesting lecture on Entropy63 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses