3) EQUILIBRIUM THERMODYNAMICS - CHOOSE THE CORRECT ANSWER

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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)
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
dU=0
If a particular amount of charge dq is transported against an electric force, then the electric work done is:
a) dW= dq/φ
b) dW= φdq
c) dW= φ/dq
dW=φdq
Electric potential is defined as the potential energy of a positive test charge divided by
a) the electric work
b) the strength of the electric field
c) the magnitude of the charge
the magnitude of the charge
A bock of steel with a mass of 1 kg is at a temperature of 60 °C (C𝓈𝓉𝑒𝑒𝓁 = 450 J/kg/°C). It is placed in contact with an identical block of steel at a temperature of 20 °C. The heat energy of the combined system in Joules will change by
a) 0
b) 9000
c) 18000
d) 90000
18000
The normal internal temperature of our bodies is 37°C. What is this temperature when expressed in units of Kelvins to the nearest power of ten?
a) 37
b) 236
c) 310
d) 69
310
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
is the second law of thermodynamics
The first law of thermodynamics states that
a) energy is the capacity for doing work
b) work is force times displacement
c) heat flows from a warmer body to a cooler body
d) energy is neither created nor destroyed
energy is neither created nor destroyed
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 entropy of the universe is continually increasing
The internal energy change in a system that has absorbed 2 kcals of heat and done 500 J of work is:
a) 6400 J
b) 5400 J
c) 7900 J
d) 8900 J
7900 J
A system does no work even when heat is added to it. Which of the following may happen to the system?
a) The system expands
b) The internal energy of the system increases
c) Both a and b
d) Neither a nor b
The internal energy of the system increases
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