Heating & Cooling Graphs Flashcards

All 5 cards in this deck

On a heating graph, what does a flat (horizontal) section show?

A change of state — energy is being supplied but the temperature is not changing.

True or false? During the flat section at the melting point, both solid and liquid are present.

True. The substance is part-melted until all of it has changed state.

On a heating graph, what does a sloping section tell you?

The temperature is rising, so the substance stays in one state and the mean kinetic energy of its particles is increasing.

On a heating graph, what does a steeper sloping section tell you about the specific heat capacity?

The specific heat capacity is lower — less energy is needed to raise the temperature by a fixed amount.

On a heating graph, what does a longer flat section tell you about the specific latent heat?

The specific latent heat is greater — more energy is needed to change the state of that substance.