People who live where snowfall is common will tell you that air temperatures are higher when it’s snowing than when its clear. Some misinterpret this by stating that snowfall can’t occur on very cold days. Explain this misinterpretation.

Why does rising unsaturated air (air rising below the lifting condensation level) cool more quickly (at the dry adiabatic rate) than air rising above the lifting condensation level (at the saturated adiabatic rate)? Adiabatic cooling only takes place above the lifting condensation level. Above the lifting condensation level, latent heat released during condensation counteracts some of the adiabatic cooling of rising air. Adiabatic warming takes place above the lifting condensation level.

People that live at high altitudes often notice that sealed bags of food are puffed up because the air inside has expanded since they were sealed at a lower altitude. In one example, a bag of potato chips was packed at a pressure of 1.00atm and a temperature of 20.5 degrees celcius. The bag was then transported to Santa Fe. The sealed bag of potato chips then finds its way to a summer picnic where the temperature is 31.6 degrees celcius, and the volume of air in the bag has increased to 1.4 times its original value. At the picnic in Santa Fe, what is the pressue, in atmospheres, of the air in the bag?

A tank of water has been outdoors in cold weather, and a slab of ice 4.8 cm thick has formed on its surface (see the figure). The air above the ice is at -7.4°C. Calculate the rate of formation of ice (in centimeters per hour) on the ice slab. Take the thermal conductivity of ice to be 0.0040 cal/s-cm-C, its density to be 0.92 g/cm2, and its latent heat of fusion to be 333 kJ/kg. Assume no energy transfer through the tank walls or bottom. Air Ice Water Number i Units