Two identical 1.0 kilogram blocks of copper metal, one initially at a temperature T 1 = 0 ∘ C and the other initially at a temperature T 2 = 100 ∘ C , are enclosed in a perfectly insulating contai

Question

Two identical 1.0 kilogram blocks of copper metal, one initially at a temperature $T_{1}$ = $0^{\circ} C$ and the other initially at a temperature $T_{2}$ = $100^{\circ} C$ , are enclosed in a perfectly insulating container. The two blocks are initially separated. When the blocks are placed in contact, they come to equilibrium at a final temperature $T_{f}$ . The amount of heat exchanged between the two blocks in this process is equal to which of the following? (The specific heat of copper metal is equal to 0.1 kilocalorie/ kilogram °K.)

Options:

Answer:

D

Solution:

Equal heat capacities give the mean final temperature.
$T_{f} = \frac{0 + 100}{2} = 50^{\circ} C$
$Q = m c Δ T$
$Q = 1 (0.1) (50) = 5 kcal$
No answer is marked in the source; D is independently derived.

TestHub · Accepted Answer

Equal heat capacities give the mean final temperature. T f ​ = 2 0 + 100 ​ = 50 ∘ C Q = m c Δ T Q = 1 ( 0.1 ) ( 50 ) = 5 kcal No answer is marked in the source; D is independently derived.

Physics - Heat & Thermo Question with Solution | TestHub

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