Heating Curves

Front

What is a heating curve?

Back

A heating curve is a graph that shows the change in temperature of a substance as it is heated over time, illustrating phase changes and temperature changes.

Front

What is the boiling point of a substance?

Back

The boiling point is the temperature at which a substance changes from a liquid to a gas.

Front

What happens during the segment B-C on a heating curve?

Back

During segment B-C, the substance is undergoing a phase change from solid to liquid, and the temperature remains constant.

Front

What is the equation used to calculate heat during a phase change?

Back

q = mΔH, where q is the heat absorbed or released, m is the mass, and ΔH is the enthalpy change.

Front

What does the symbol ΔH_fus represent?

Back

ΔH_fus represents the enthalpy change associated with the melting of a substance.

Front

What is the significance of the segments A-B and C-D on a heating curve?

Back

Segments A-B and C-D represent temperature changes where the substance is either heating up or cooling down without changing phase.

Front

What is condensation in the context of a cooling curve?

Back

Condensation is the process where a gas changes into a liquid, typically occurring at the boiling point.

Front

What is the heat equation for temperature changes?

Back

q = mCΔT, where q is the heat, m is the mass, C is the specific heat capacity, and ΔT is the change in temperature.

Front

What happens during segment D-E on a cooling curve?

Back

During segment D-E, the substance is undergoing a phase change from liquid to solid, known as freezing.

Front

What is the specific heat capacity?

Back

Specific heat capacity is the amount of heat required to raise the temperature of 1 gram of a substance by 1°C.