(a) A skin burn from steam causes is a more serious injury than one from boiling water (assuming that other factors, such as the quantity of water and the contact time with skin, are the same). Explain why this is the case by comparing the energy of steam vs.boiling water and referring to the heating curve of water.

(b) Can there be liquid water on the surface of Mars? Atmospheric pressure is 0.006 atm. Explain why or why not. Refer to the phase diagram of water in your discussion