A closed container has within it 20 lbm of liquid and 20 lbm of vapor at 400 o F. Determine the total amount of heat, in BTU, that must be added to raise the temperature to 425 o F.

Which of the following describes qualitative data? a) recording the temperature of a solid as it is warmed. b) noting the color of a solution as it is heated. c) measuring the volume of an object by water displacement. d) taking the mass of an object using a balance.