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- 1. Multiple Choice
What line segment represents only the solid state?A-BB-CC-DD-E - 2. Multiple Choice
In which segment is the average kinetic energy (temperature) remaining constant?
A-B
B-C
C-D
E-F
- 3. Multiple ChoiceWhat state(s) of matter are present at D-E?Solid-liquidLiquidLiquid-gasGas-Solid
- 4. Multiple ChoiceTrue or false: melting and freezing occur at the same temperature!TrueFalseI don't know
- 5. Multiple ChoiceA substance's heating curve is shown in the graph. What is its boiling point?100 C60 C80 C20 C
- 6. Multiple ChoiceWhich of these conditions is always true for an exothermic process?They leave the surroundings feeling coldThey release energy into the surroundings.They absorb energy from the surroundingsThe reactants gain energy as they form the products
- 7. Multiple ChoiceWhich of the following terms identifies the change from a liquid to gas?VaporizationCondensationDepositionSublimation
- 8. Multiple ChoiceWhen the temperature of matter increases the particles...speed up and move closerspeed up and move farther apartslow down and move closer togetherslow down and move farther apart
- 9. Multiple Choice
From point A to point E, the sample is going through an
exothermic process by releasing heat to the surroundings
exothermic process by absorbing heat from the surroundings
endothermic process by releasing heat to the surroundings
endothermic process by absorbing heat from the surroundings
- 10. Multiple Choice
The melting point of the sample is
-60 ºC
-100 ºC
60 ºC
100 ºC
- 11. Multiple ChoiceIn an endothermic reaction the system is releasing energy.TrueFalse
- 12. Multiple ChoiceA reaction is performed in a beaker with a temperature probe recording the temperature changes of the reaction. If the temperature began at 15.0 degrees Celsius and ended at 27.5 degrees Celsius. If the reaction is our system, is the system endothermic or exothermic?ExothermicEndothermic
- 13. Multiple ChoiceDo reactants in an endothermic reaction have a higher or lower energy than the products?HigherLower
- 14. Multiple ChoiceH2 + Cl2 --> 2 HCl + 1845 kJ
Is this reaction endothermic or exothermic?EndothermicExothermic - 15. Multiple ChoiceWhich of the letters (A-D) represents activation energy?ABCD
- 16. Multiple ChoiceWhat kind of reaction has a negative heat of reaction (ΔHr)?endothermicexothermic
- 17. Multiple ChoiceConsider the reaction: 2 H2O + energy --> 2H2 + O2exothermic, releasing energyexothermic, absorbing energyendothermic, absorbing energyendothermic, releasing energy
- 18. Multiple Choice
When you freeze water, it turns to ice. What kind of change is this?
endothermic
exothermic
- 19. Multiple ChoiceHave you ever eaten sherbet sweets candy? They fizz in your mouth and your tongue feels cold. Why do you think that is?It is an exothermic reactionIt is an endothermic reactionIt is made of iceIt is dissolving your mouth
- 20. Multiple ChoiceEvaporation is what kind of change?EndothermicExothermic
- Answer choicesTagsAnswer choicesTags