Latent Heat (Leaving Cert Physics): Flashcards

Energy to change state without changing temperature

Energy for solid↔liquid change at constant temp

Energy for liquid↔gas change at constant temp

$0°C$

$100°C$

Energy to change state of $1$ kg without temp change

$Q = ml$

Heat energy (J)

Mass (kg)

Specific latent heat (J kg$^{-1}$)

$334,000$ J kg$^{-1}$ (or $3.34 \times 10^5$)

$2,260,000$ J kg$^{-1}$ (or $2.26 \times 10^6$)

Stays constant while energy is added/removed

Breaks/forms bonds between molecules

Vaporisation (much more)