1. A water pipe at 13°C passes through a basement in which the air is at 21↑8C. What is the maximum relative humidity the air can have before condensation occurs on the pipe?
2. A can of soft drink at a temperature of 40°F is taken from a refrigerator into a room where the temperature is 70°F and the relative humidity is 70%. Explain why beads of moisture form on the can's outer surface. Provide supporting calculations.