Temperature, Quantity of Heat, and Heat Capacity (HSC SSCE Chemistry): Quizzes

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Temperature, Quantity of Heat, and Heat Capacity
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What distinguishes quantity of heat from temperature?

Heat is total thermal energy; temp is hotness

What is thermal equilibrium?

When two objects reach the same temperature

A red-hot pin and red-hot horseshoe glow at the same temperature. Which contains more heat energy?

The horseshoe due to greater mass

What is specific heat capacity?

Heat to raise unit mass by 1°C or 1 K

What is the specific heat capacity of water in J K−1g−1\text{J K}^{-1} \text{g}^{-1}?

4.184.18

Why do metal objects heat up and cool down quickly?

Metals have low specific heat capacities

Which equation calculates quantity of heat for a temperature change?

q=mcΔTq = mc\Delta T

If temperature increases, what is the sign of qq in q=mcΔTq = mc\Delta T?

Positive (heat gained)

Heat needed to warm 155 g water from 17.0°C to 35.5°C? (c=4.18c = 4.18 J K−1g−1\text{J K}^{-1} \text{g}^{-1})

1.20×1041.20 \times 10^4 J

Which substance has the lowest specific heat capacity?

Mercury at 0.140.14 J K−1g−1\text{J K}^{-1} \text{g}^{-1}

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