Chem 2 - Heat Transfer (Specific Heat) Calculations

Front

What is specific heat?

Back

Specific heat is the amount of heat energy required to raise the temperature of 1 gram of a substance by 1 degree Celsius (°C). It is a property that varies from one material to another.

Front

What is the formula to calculate heat transfer?

Back

The formula to calculate heat transfer (Q) is: Q = m * c * ΔT, where m is the mass, c is the specific heat capacity, and ΔT is the change in temperature.

Front

What is the unit of specific heat?

Back

The unit of specific heat is Joules per gram per degree Celsius (J/g°C).

Front

If 100 J of energy is added to a substance with a specific heat of 0.5 J/g°C and the mass is 20 g, what is the temperature change?

Back

The temperature change (ΔT) can be calculated using the formula: ΔT = Q / (m * c) = 100 J / (20 g * 0.5 J/g°C) = 10°C.

Front

What happens to the temperature of a substance when heat is added?

Back

When heat is added to a substance, its temperature increases, provided that the substance is not undergoing a phase change.

Front

What is thermal energy?

Back

Thermal energy is the total kinetic energy of the particles in a substance, which is related to its temperature.

Front

What is the relationship between mass and thermal energy?

Back

The thermal energy of a substance is directly proportional to its mass; larger masses contain more thermal energy at the same temperature.

Front

What is the temperature change if a material is cooled from 80°C to 20°C?

Back

The temperature change is ΔT = final temperature - initial temperature = 20°C - 80°C = -60°C.

Front

What is the significance of the specific heat of a material?

Back

The specific heat of a material indicates how much energy is required to change its temperature, which affects how quickly it heats up or cools down.

Front

How does the size of a container affect the amount of thermal energy it holds?

Back

The larger the container, the more thermal energy it can hold at the same temperature, because it contains more mass.