Question

Samples A and B are at different initial temperatures when they are placed in a thermally insulated container and allowed to come to thermal equilibrium. Figure (a) gives their temperatures T versus time t. Sample A has a mass of 5.62 kg; sample B has a mass of 1.27 kg. Figure (b) is a general plot for the material of sample B. It shows the temperature change ΔT that the material undergoes when energy is transferred to it as heat Q. The change ΔT is plotted versus the energy Q per unit mass of the material, and the scale of the vertical axis is set by ΔTₛ = 4.50 °C. What is the specific heat of sample A? 100 ΔTₛ T (°C) A 60 20 0 B t (min) (a) ΔT (C°) 10 20 0 8 Q/m (kJ/kg) (b) 16

          Samples A and B are at different initial temperatures when they are placed in a
thermally insulated container and allowed to come to thermal equilibrium. Figure (a)
gives their temperatures T versus time t. Sample A has a mass of 5.62 kg; sample B has
a mass of 1.27 kg. Figure (b) is a general plot for the material of sample B. It shows the
temperature change ΔT that the material undergoes when energy is transferred to it
as heat Q. The change ΔT is plotted versus the energy Q per unit mass of the material,
and the scale of the vertical axis is set by ΔTₛ = 4.50 °C.
What is the specific heat of sample A?
100
ΔTₛ
T (°C)
A
60
20
0
B
t (min)
(a)
ΔT (C°)
10
20
0
8
Q/m (kJ/kg)
(b)
16

samples a and b are at different initial temperatures when they are placed in a thermally insulated container and allowed to come to thermal equilibrium figure a gives their temperatures t v 59103

Added by Kevin F.

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