[size=4][b]Phase Change And Latent Heat.[/b] A bag containing 0°C ice is much more effective in absorbing energy than one containing the same amount of 0°C water. How much heat transfer is required first to melt 0.800 kg of 0°C ice and then raise its temperature to 30.0 °C?[/size]

[size=4][b]Phase Change And Latent Heat.[/b] If you pour 0.0100 kg of 20.0 °C water onto a 1.20 kg block of ice (which is initially at −15.0 °C ), what is the final temperature? You may assume that the water cools so rapidly that the effects of the surroundings are negligible.[/size]

[size=4][b]Conduction. [/b]Compare the rate of heat conduction through a 13.0 cm thick wall that has an area of 10.0 m[sup]2[/sup] and a thermal conductivity twice that of glass wool with the rate of heat conduction through a window glass that is 0.750 cm thick and that has an area of 2.00 m[sup]2[/sup] and a thermal conductivity of 0.84 J/s.m.°C, assuming the same temperature difference across each. (Use thermal conductivity of glass wool, k = 0.042 J/s.m.°C)[/size]

[size=4][b]Radiation. [/b]A shirtless rider under a circus tent feels the heat radiating from the sunlit portion of the tent. Calculate the temperature of the tent canvas based on the following information: The shirtless rider’s skin temperature is 34.0 °C and has an emissivity of 0.970. The exposed area of skin is 0.400 m[sup]2[/sup]. He receives radiation at the rate of 20.0 W, half what you would calculate if the entire region behind him was hot. The rest of the surroundings are at 34.0 °C.[/size]

[size=4][b]First Law of Thermodynamics. [/b]A helium‐filled toy balloon has a gauge pressure of 0.200 atm and a volume of 10.0 L. How much greater is the internal energy of the helium in the balloon than it would be at zero gauge pressure? Assume the volume remains constant.[/size]