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For an isolated system, the change in internal energy according to the 1s law of thermodynamics is

a) dU = W
b) dU = Q
c) dU = 0
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Terms in this set (15)
The conclusion that it is impossible to completely convert heat into work without making other changes in the universe
a) is based on erroneous observations
b) shows that all irreversible processes are accompanied by an increase in entropy
c) is another way of stating that all forms of energy are either thermal energy or heat
d) is the second law of thermodynamics
The second law of thermodynamics states that

a) spontaneous reactions are always exothermic
b) energy is conserved in a chemical reaction
c) the entropy of the universe is continually increasing
d) the enthalpy of a reaction is the difference between product and reactant enthalpies
e) the Gibbs free energy is a function of entropy
The first law of thermodynamics states that energy is a) increased during any process b) decreased during any process c) conserved during any processconserved during any processA cube of ice is added to some hot water in a rigid, insulated container, which is then sealed. There is no heat exchange with the surroundings. What has happened to the total energy and the total entropy when the system reaches equilibrium? a) Energy: remains constant; Entropy: remains constant b) Energy: remains constant; Entropy: decreases c) Energy: remains constant; Entropy: increases d) Energy: increases; Entropy: decreases e) Energy: decreases; Entropy: increasesEnergy: remains constant; Entropy: increasesA gas is enclosed in a metal container with a moveable piston on top. Heat is added to the gas by placing a candle flame in contact with the container's bottom. Which of the following is true about the temperature of the gas? a) The temperature will go up if the piston remains stationary. b) The temperature will go up if the piston is pulled out dramatically. C The temperature will go up no matter what happens to the piston. d) The temperature will go down no matter what happens to the piston. e) The temperature will go down if the piston is compressed dramatically.The temperature will go up no matter what happens to the piston.The energy of random molecular motion is called a) heat b) free energy c) enthalpy d) potential energy e) activation energyheatIf 5 J of energy is added to a system that does no external work, by how much will the internal energy of that system be raised? a) 0 J b) 5J c) 10 J d) Cannot be found5 J