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constants
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1. Which compound is not in natural gas?
propane methane butane ethane all of the above

2. Work is defined as:
force over distance energy over time money over time speed over distance none of the above

3. The first law of thermodynamics states:
energy can neither be destroyed nor produced the energy of universe is constant the entropy of a perfect crystal is zero the entropy of the universe is increasing none of the above

4. Which statement is FALSE?
extensive properties depend directly on the amount of substance temperature is an extensive property intensive properties do not depend on the amount of substance mass is an extensive property all statements are true

5. The pathway is dependent of:
heat work change in energy A & B B & D

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