Chapter 9 Heat Sheltered

Front

What is thermal expansion?

Back

Thermal expansion is the increase in volume of a substance due to an increase in temperature, causing particles to move apart.

Front

Why do metal bridges have expansion joints?

Back

Metal bridges have expansion joints to accommodate the expansion of metal during hot weather, preventing structural damage.

Front

What is the specific heat capacity of water?

Back

The specific heat capacity of water is 1 calorie/gram °C, meaning it takes 1 calorie to raise the temperature of 1 gram of water by 1°C.

Front

How do you calculate heat energy (Q) added or removed?

Back

Q = mass (m) × specific heat capacity (c) × change in temperature (ΔT).

Front

What happens to water molecules when ice melts?

Back

When ice melts, water molecules gain energy and move faster, transitioning from a solid to a liquid state.

Front

What is the process of evaporation?

Back

Evaporation is the process where liquid water turns into vapor, requiring heat energy to break intermolecular bonds.

Front

How much heat is released when 10 grams of water cools from 50°C to 40°C?

Back

100 calories are released when 10 grams of water cools from 50°C to 40°C.

Front

What occurs to mercury in a thermometer when temperature decreases?

Back

When temperature decreases, mercury contracts and moves down the tube, indicating a lower temperature.

Front

What is the latent heat of fusion?

Back

Latent heat of fusion is the amount of heat required to change a substance from solid to liquid at its melting point without changing its temperature.

Front

What is the latent heat of vaporization?

Back

Latent heat of vaporization is the amount of heat required to convert a liquid into a vapor at its boiling point without changing its temperature.