Question

The thermal capacity of 40 g of aluminium
(specific heat=0.2 cal/gm°C)
(1) 40 call°C
(2) 160 calc
(3) 200 cal/°C
44)8 cal/°C​

Answer 1

Thermal capacity= m * specific heat capacity

• T= 40*.2cal/gmdegreeC therefore

Thermal capacity is 8 cal/degreeC Option 4

Answer 2

4) 8 cal/K

Explanation:

Thermal capacity = ms = 40 x 0.2= 8 cal/K = 33.6 joule/K.

Thermal capacity is the property of a material to absorb heat when it is heated and to release heat when it is cooled. It is defined by:

Q=mxC(T2-T1)

or

C=Q/m(T2-T1)

In this formula: 

• Q is the heat absorbed or released by a material (J)
• m is the mass of a material (g);

• C is the specific heat of a material [J/(g∙K)];
• T2 –T1 is the temperature difference before and after heating or cooling (K).