24-25ThermoAP Chemistry

Front

Calculate the heat required to raise 500 g of water from 20°C to 80°C (specific heat of water = 4.18 J/g°C):

Back

125400 J

Front

What does 'endothermic' mean?

Back

Absorb energy.

Front

The freezing of water is considered...

Back

Exothermic, heat is being released.

Front

What does the first law of thermodynamics state?

Back

Energy is conserved.

Front

What is the study of heat changes that accompany chemical reactions and phase changes?

Back

Thermochemistry.

Front

What is the specific heat capacity of water?

Back

4.18 J/g°C.

Front

Define exothermic reaction.

Back

A reaction that releases energy, usually in the form of heat.

Front

Define endothermic reaction.

Back

A reaction that absorbs energy from its surroundings.

Front

What is the formula to calculate heat (q)?

Back

q = m × c × ΔT, where m is mass, c is specific heat, and ΔT is the change in temperature.

Front

What happens to energy in an exothermic reaction?

Back

Energy is released to the surroundings.