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- 1. Multiple ChoiceIn an exothermic process the surrounding looses heat.TrueFalse
- 2. Multiple ChoiceIn an endothermic reaction the system is releasing energy.TrueFalse
- 3. Multiple ChoiceIs the combustion of gasoline endothermic or exothermic?EndothermicExothermic
- 4. Multiple ChoiceAs someone is running on the track they begin to perspire. If the runner is our system, are they endothermic or exothermic?Endothermic processExothermic process
- 5. 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
- 6. Multiple ChoiceRefer the the following question:
2N2 + 3H2 --> 2NH3 + 46 kJ
How much energy would be produced if only 1 mol of nitrogen was reacted?92 kJ0.143 kJ23 kJ15 kJ - 7. Multiple ChoiceHow much energy must be used to produce 4.75 mol of gaseous water?
H2O (l) + 44.0 kJ --> H2O (g)207 kJ9.36 kJ206.8 kJ9.362 kJ - 8. Multiple ChoiceWhat mass of P4 must be reacted to produce 5905 kJ of energy?
P4 + 6Cl2 --> 4PCl3 + 2439 kJ25.43 g563.0 g2.421 g300.0 g - 9. Multiple ChoiceDo reactants in an endothermic reaction have a higher or lower energy than the products?HigherLower
- 10. Multiple ChoiceDo the reactants in an exothermic reaction have a higher or lower energy than the products?HigherLower
- 11. Multiple Choice4 PCl5 + 3438 kJ --> P4 + 10 Cl2
How much energy is required to produce each mole of chlorine?687.6 kJ859.5 kJ343.8 kJ245.8 kJ - 12. Multiple ChoiceIn a laboratory experiment a student was using Styrofoam cups and foil to reduce the energy lost during an exothermic reaction. The reaction constantly had a temperature probe in it. Towards the end of the reaction the student noticed the temperature in the cups was going down (opposite what they thought is should). The student concluded that the energy was destroyed within the system. This student's reasoning violates what law?Law of Conservation of MassLaw of EnthalpyFirst Law of ThermodynamicsLaw of Heat Transfer
- 13. Multiple Choice
During an endothermic reaction in a beaker if we are part of the surroundings and touched the beaker, it would feel _______.
Warm
Cold
Bubbly
Damp
- 14. Multiple ChoiceH2 + Cl2 --> 2 HCl + 1845 kJ
Is this reaction endothermic or exothermic?EndothermicExothermic - 15. Multiple ChoiceH2 + 2 C + N2 + 270.3 kJ --> 2 HCN
Is this reaction endothermic or exothermic?EndothermicExothermic - Answer choicesTagsAnswer choicesTags