Calculate the number of kJ of heat necessary to raise the temperature of 60.0g of aluminium from 35 to 55°C. Molar heat capacity of aluminium is 24 J mol^–1 K^–1.

Solution

We know,
$straight q space equals space straight n space cross times space straight C space cross times space increment straight T$ ...(1)
$Here comma space space straight n space equals space 60 over 27 mol semicolon space space space straight C space equals space 24 space straight J space mol to the power of negative 1 end exponent straight K to the power of negative 1 end exponent semicolon space space space increment straight T space equals space left parenthesis 55 minus 35 right parenthesis straight K space equals space 20 straight K$
Substituting the values in eq. (1), we get
$straight q space equals space open parentheses 60 over 27 mol close parentheses space cross times space left parenthesis 24 space straight J space mol to the power of negative 1 end exponent straight K to the power of negative 1 end exponent right parenthesis space cross times space 20 straight K$
= 1066.7 J = 1.07 kJ

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Thermodynamics

Calculate the number of kJ of heat necessary to raise the temperature of 60.0g of aluminium from 35 to 55°C. Molar heat capacity of aluminium is 24 J mol^–1 K^–1.

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For Daily Free Study Material Join wiredfaculty

Thermodynamics

Calculate the number of kJ of heat necessary to raise the temperature of 60.0g of aluminium from 35 to 55°C. Molar heat capacity of aluminium is 24 J mol–1 K–1.

Some More Questions From Thermodynamics Chapter

Define extensive properties.

Why all living systems need to be 'open systems'?

Define state variables of a system.

From thermodynamic point of view, to which system the animals and plants belong?

What is a state function?

A thermodynamic state function is a quantity

What is reversible process in thermodynamics?

Define irreversible change.

Name the variable that is kept constant in isochoric process and isobaric process.

Give one difference between an isothermal and an adiabatic process.

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

Calculate the number of kJ of heat necessary to raise the temperature of 60.0g of aluminium from 35 to 55°C. Molar heat capacity of aluminium is 24 J mol^–1 K^–1.