Unit 10 ThermoChemistry Test Review

Front

What is an endothermic reaction?

Back

An endothermic reaction is a chemical reaction that absorbs heat from its surroundings, resulting in a decrease in temperature of the surroundings.

Front

What is an exothermic reaction?

Back

An exothermic reaction is a chemical reaction that releases heat to its surroundings, resulting in an increase in temperature of the surroundings.

Front

What is specific heat?

Back

Specific heat is the amount of heat required to raise the temperature of 1 gram of a substance by 1 degree Celsius.

Front

How do you calculate the specific heat of a substance?

Back

Specific heat (c) can be calculated using the formula: c = q / (m * ΔT), where q is the heat absorbed or released, m is the mass, and ΔT is the change in temperature.

Front

What is the specific heat of water?

Back

The specific heat of water is 4.18 J/g°C.

Front

Which material has a higher specific heat: wood or water?

Back

Water has a higher specific heat (4184 J/KgºC) compared to wood (1760 J/KgºC), meaning it requires more energy to raise its temperature.

Front

What happens to temperature during an endothermic reaction?

Back

In an endothermic reaction, the temperature of the surroundings decreases as the system absorbs heat.

Front

What is the relationship between thermal energy and temperature change?

Back

The amount of thermal energy absorbed or released by a substance is directly related to its mass, specific heat, and the change in temperature.

Front

If 10,000 J of thermal energy is applied to different materials, which material will have the largest temperature change?

Back

The material with the lowest specific heat will have the largest temperature change when the same amount of thermal energy is applied.

Front

What is the formula for calculating heat transfer?

Back

The formula for calculating heat transfer is q = m * c * ΔT, where q is the heat transfer, m is the mass, c is the specific heat, and ΔT is the change in temperature.