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- 1. Multiple ChoiceDescribe the energy change that takes place when a chemical reaction occurs.a) Energy is given outb) Energy is taken inc) Energy is taken in and then given outd) Energy is given out and then taken in
- 2. Multiple ChoiceWhich statement is true regarding endothermic reactions?a) Temperature change is positive and enthalpy change is positiveb) Temperature change is positive and enthalpy change is negativec) Temperature change is negative and enthalpy change is positived) Temperature change is negative and enthalpy change is negative
- 3. Multiple ChoiceWhich statement is true regarding exothermic reactions?a) Temperature change is positive and enthalpy change is positiveb) Temperature change is positive and enthalpy change is negativec) Temperature change is negative and enthalpy change is positived) Temperature change is negative and enthalpy change is negative
- 4. Multiple ChoiceHeat is measured injoulesgramsdegrees celcius
- 5. Multiple ChoiceEnergy in exothermic reactions arereleasedabsorbed
- 6. Multiple ChoiceEndothermic reactions feelwarmcold
- 7. Multiple Choice
What type of reaction is shown in the reaction pathway?endothermic reactionexothermic reaction - 8. Multiple ChoiceN2 + 3H2 −-> 2NH3
How many moles of ammonium are produced when 3 moles of nitrogen react with hydrogen?6 moles Ammonium1.5 moles ammonium9 moles ammonium9 moles hydrogen - 9. Multiple ChoiceWhat is the symbol for enthalpy?HSGq
- 10. Multiple Choice
For which of these processes is the value of ΔH expected to be positive?
1. The temperature increases when calcium chloride dissolves in water.
2. Steam condenses to liquid water
3. Water boils
4. Dry ice sublimates
4 only
1 only
3 and 4 only
2 and 3 only
- Answer choicesTagsAnswer choicesTags