Two objects are made of the same material, but they have different masses and temperatures.

Part A

If the objects are brought into thermal contact, which one will have the greater temperature change?

a. The one with the lesser mass.
b. The one with the lower initial temperature.
c. The one with the higher initial temperature.
d. The one with the higher specific heat.
e. The one with the greater mass.
f. Not enough information

a. The one with the lesser mass.

Explanation:

Since , both are made of the same material , they will have same specific heat . On physical contact , heat will be exchanged between them with heat flowing from body at higher temperature to one at lower temperature . Amount of heat lost by one will be equal to amount of heat gained .

So temperature change will take place in both of them  but they will not be same . Body of higher mass will undergo lesser change in temperature because of the following relation

Q = mcΔT

ΔT = Q / mc

ΔT   ∝   1 / m

change in temperature will be inversely proportional to mass of object if Q or heat exchanged is constant .

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