1. A certain metal expands by 2% every 78oC change of temperature, what is the average
coefficient of linear expansion of the metal?
2. How much heat needed to turn 30 grams of ice at -15oC to water vapor at 110oC? Show
TQ diagram.
3. How many grams of water vapor at 1100C must be mixed with 10grams of ice at -10oC in
order to produce water at 650C?
4. A Styrofoam box has a surface area of 0.80 m2 and a wall thickness of 2.0 cm. The
temperature of the inner surface is 5.0°C, and the outside temperature is 25°C. If it takes 8.0
hours for 5.0 kg of ice to melt in the container, determine the thermal conductivity of the
Styrofoam.