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Chemistry

Chemistry

Quiz 6 :

Thermochemistry

Quiz 6 :

Thermochemistry

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Which of the following is TRUE if img U = -95 J?
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B

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Which of the following statements is FALSE?
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E

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Energy that is associated with the position or composition of an object is called
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C

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A piece of iron (C = 0.449 J g-1 °C-1 and a piece of gold (C = 0.128 J g-1 °C-1) have identical masses. If the iron has an initial temperature of 498 K and the gold has an initial temperature of 298 K, which of the following statements is TRUE of the outcome when the two metals are placed in contact with one another? Assume no heat is lost to the surroundings.
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Define heat capacity.
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Identify the unit of specific heat capacity.
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Define specific heat capacity.
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Determine the specific heat capacity of an alloy that requires 59.3 kJ to raise the temperature of 150.0 g alloy from 298 K to 398 K.
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Calculate the amount of heat (in kJ) necessary to raise the temperature of 47.8 g benzene by 57.0 K. The specific heat capacity of benzene is 1.05 J g-1 °C-1.
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Which of the following substances (with specific heat capacity provided) would show the greatest temperature change upon absorbing 100.0 J of heat?
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For img U to always be -, what must be true?
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Calculate the amount of heat (in kJ) required to raise the temperature of a 79.0 g sample of ethanol from 298.0 K to 385.0 K. The specific heat capacity of ethanol is 2.42 J g-1 °C-1.
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Define molar heat capacity.
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Which of the following signs on q and w represent a system that is doing work on the surroundings as well as losing heat to the surroundings?
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Identify the unit of heat capacity.
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A sample of copper absorbs 43.6 kJ of heat, resulting in a temperature rise of 75.0 °C. Determine the mass (in kg) of the copper sample if the specific heat capacity of copper is 0.385 J g-1 °C-1.
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Calculate the change in internal energy (ΔU) for a system that is giving off 45.0 kJ of heat and is performing 855 J of work on the surroundings.
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Which of the following signs on q and w represent a system that is doing work on the surroundings as well as gaining heat from the surroundings?
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The water at the top of a waterfall contains ________ energy.
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Which of the following (with specific heat capacity provided) would show the smallest temperature change upon gaining 200.0 J of heat?
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