A heat of transformation of a substance is:
A. the energy absorbed as heat during a phase transformation
B. the energy per unit mass absorbed as heat during a phase transformation
C. the same as the heat capacity
D. the same as the specific heat
E. the same as the molar specific heat
Answer: B. the energy per unit mass absorbed as heat during a phase transformation
You might also like to view...
Second Law of Thermodynamics: The second law of thermodynamics leads us to conclude that
A. the total energy of the universe is constant. B. disorder in the universe is increasing with the passage of time. C. it is theoretically possible to convert heat into work with 100% efficiency. D. the average temperature of the universe is increasing with the passage of time. E. the entropy of the universe remains constant.
A 50-gram sample of dry ice (solid CO2) is placed in a 4-liter container. The system is sealed and allowed to reach room temperature (20°C). By approximately how much does the pressure inside the container increase when the dry ice turns to gas? (Ignore the initial volume of the sample.)
A microscope has an objective lens of focal length 1.4 mm and an eyepiece of focal length 20 mm, adjusted for minimum eyestrain. A blood sample is placed 1.5 mm from the objective
How far apart are the lenses? A) 20 mm B) 21 mm C) 23 mm D) 33 mm E) 41 mm
You have a piece of clay and a rubber ball, both of the same mass. You want to close a door on the other side of the room by throwing either the clay or the rubber ball at the door. Assume that both would be thrown with the same speed and would impact the door at the same point on the door. With which would you be more likely to cause the door to close further?
1.the rubber ball 2.the clay ball 3.Both would cause the door to close the same distance. 4.It is impossible to tell.