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- 1. Multiple ChoiceEntropy is a measure of the number of possible ways that the energy of a system can be distributed.truefalse
- 2. Multiple ChoiceThe SI unit of heat and energy is the __________.calorieheatjoulewatt
- 3. Multiple ChoiceThe amount of energy required to raise the temperature of one gram of pure water by one degree Celsius is defined as:a joulea watta calorieheat
- 4. Multiple ChoiceThe __________ law of thermodynamics states that entropy is always increasing.firstsecondthirdzeroth
- 5. Multiple ChoiceHeat transfer [blank] occurs from hot to cold.alwaysneversometimesrarely
- 6. Multiple ChoiceWhich substance is the better conductor?steelgoldwoodaluminum
- 7. Multiple ChoiceTemperature is a measure of average [blank] energy of individual atoms.heatpotentialmechanicalkinetic
- 8. Multiple ChoiceΔH value in an endothermic reaction is a positive number.TrueFalse
- 9. Multiple ChoiceWhich phase of matter has the greatest motion and least orderly arrangement?solidliquidgas
- 10. Multiple ChoiceThe equation that relates enthalpy, temperature and entropy isHess's LawSecond Law of ThermodynamicsGibbs Free EnergyCalorimetry
- 11. Multiple ChoiceTrue/False: The rate of a chemical reaction is unrelated to the spontaneity of the reaction.TrueFalse
- 12. Multiple ChoiceA catalyst works bychanging the order of the reactionincreasing the temperaturelowering the activation energymaking the activated complex
- 13. Multiple ChoiceIf 25 J are required to change the temperature of 5.0 g of substance A by 2.0°C, what is the specific heat of substance A?250 J/g C10 J/g C63 J/g C2.5 J/g C
- 14. Multiple ChoiceFor 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 sublimates4 only1 only3 and 4 only2 and 3 only - 15. Multiple Choice6. The formation ½ A2 + 2 B2 + C --> CAB4 has an enthalpy of formation of -104 kJ and a change in entropy of -60.8 J/K at 30 °C. What is the free energy and spontaneity of the reaction?-85.6 kJ, spontaneous-18.3 kJ, not spontaneous+18.3 kJ, spontaneous+85.6 kJ, not spontaneous
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