2. Thermodynamics

Phase Changes — Quiz

Test your understanding of phase changes with 5 practice questions.

Practice Questions

Question 1

Which of the following represents the latent heat of sublimation for water, given latent heat of fusion $L_f=3.34\times10^5\ \mathrm{J/kg}$ and latent heat of vaporization $L_v=2.50\times10^6\ \mathrm{J/kg}$?

Question 2

A saturated air parcel at 0.5 km altitude has temperature 18 °C. If it ascends to 3 km, using a moist adiabatic lapse rate of 6 °C/km, what is its temperature at 3 km?

Question 3

An air parcel undergoes condensation at a rate of 0.002 kg of water vapor per kg of air per hour. Given $L_v=2.5\times10^6\ \mathrm{J/kg}$ and $c_p=1004\ \mathrm{J/(kg·K)}$, what is the temperature increase of the parcel per hour?

Question 4

At midday over a wet surface, net radiation is 600 W/m^2, sensible heat flux is 150 W/m^2, and ground heat flux is 50 W/m^2. Assuming no heat storage, what is the latent heat flux?

Question 5

Why is the moist adiabatic lapse rate (MALR) typically lower than the dry adiabatic lapse rate (DALR)?