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- Multiple ChoicePlease save your changes before editing any questions.Entropy is a measure of the number of possible ways that the energy of a system can be distributed.truefalse
- Multiple ChoicePlease save your changes before editing any questions.The SI unit of heat and energy is the __________.calorieheatjoulewatt
- Multiple ChoicePlease save your changes before editing any questions.The 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
- Multiple ChoicePlease save your changes before editing any questions.The __________ law of thermodynamics states that entropy is always increasing.firstsecondthirdzeroth
- Multiple ChoicePlease save your changes before editing any questions.Heat transfer [blank] occurs from hot to cold.alwaysneversometimesrarely
- Multiple ChoicePlease save your changes before editing any questions.Which substance is the better conductor?steelgoldwoodaluminum
- Multiple ChoicePlease save your changes before editing any questions.Temperature is a measure of average [blank] energy of individual atoms.heatpotentialmechanicalkinetic
- Multiple ChoicePlease save your changes before editing any questions.ΔH value in an endothermic reaction is a positive number.TrueFalse
- Multiple ChoicePlease save your changes before editing any questions.Which phase of matter has the greatest motion and least orderly arrangement?solidliquidgas
- Multiple ChoicePlease save your changes before editing any questions.The equation that relates enthalpy, temperature and entropy isHess's LawSecond Law of ThermodynamicsGibbs Free EnergyCalorimetry
- Multiple ChoicePlease save your changes before editing any questions.True/False: The rate of a chemical reaction is unrelated to the spontaneity of the reaction.TrueFalse
- Multiple ChoicePlease save your changes before editing any questions.A catalyst works bychanging the order of the reactionincreasing the temperaturelowering the activation energymaking the activated complex
- Multiple ChoicePlease save your changes before editing any questions.If 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
- Multiple ChoicePlease save your changes before editing any questions.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 sublimates4 only1 only3 and 4 only2 and 3 only - Multiple ChoicePlease save your changes before editing any questions.6. 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