2. After substance A was added to a beaker of water, the water temperature decreased. Which statement explains this phenomenon?
this process was exothermic and required hear from water substance was endothermic and required heat from water substance A caused the water to boil the water molecules moved faster none of the above
3. What is the work done for the change in volume of a gas of 17L at a constant pressure of 12 atm?
100 J 204 J -204 J 347 J -347 J
4. What is pyrolytic cracking?
process in which larger kerosene molecules are broken down into smaller molecules of hydrocarbon a procedure in which a more a practical source of energy is produced the use of pyrotechnics to mine coal a process of coal conversion none of the above
5. The law of conservation of energy states that:
energy cannot be destroyed energy cannot be created energy can be converted form one form to another none of the above
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