Transcript Ch16 - Dripping Springs ISD

Thermodynamics
What is the ratio Tf /Ti
for this process?
A. 4
B. 2
C. 1 (no change)
D.
E.
An ideal-gas process in which the volume doesn’t
change is called
A.isobaric.
B.isothermal.
C.isochoric.
D.isentropic.
A gas cylinder and piston are covered with heavy insulation.
The piston is pushed into the cylinder, compressing the gas.
In this process, the gas temperature
A. doesn’t change.
B. decreases.
C. increases.
D. there’s not sufficient information to tell.
Two process are shown that take an ideal gas from state 1
to state 3. Compare the work done by process A to the
work done by process B.
A. WA = WB = 0
B. WA > WB
C. WA = WB but neither is zero
D. WA < WB
Which first-law bar chart describes the
process shown in the pV diagram?
What quantities appear in the first law of
thermodynamics?
A. force , mass, acceleartion
B. inertia, torque, angular momentum
C. work, heat, thermal energy
D. work, heat, entropy
E. enthalpy, entropy, heat
What is the name of an ideal-gas process in
which no heat is transferred?
A.Isochoric
B.Isentropic
C.Isothermal
D.Isobaric
E. Adiabatic
What is the name of the quantity represented as vrms?
A. random-measured-step viscosity
B. root-mean-squared speed
C. relative-mean-system velocity
D. radial-maser-system volume
Heat is
A.the amount of thermal energy in an object.
B.the energy that moves from a hotter object
to a colder object.
C.a fluid-like substance that flows from a
hotter object to a colder object.
D.Both a and b.
E. Both b and c.
The speed of every molecule in a gas is suddenly
increased by a factor of 4. As a result, vrms
increases by a factor of
A.16.
B.>4 but not necessarily 16.
C.4.
D.<4, but not necessarily 2.
E. 2.
Rank in order, from largest to
smallest, the work Wout
performed by these four heat
engines.
A.
B.
C.
D.
E.
Wb > W a > Wc > Wd
Wb > W a > Wb > Wc
Wb > W a > Wb = Wc
Wd > W a = Wb > Wc
Wd > W a > Wb > Wc
What is the thermal efficiency of this heat engine?
A.0.10
B.0.25
C.0.50
D.4
E. Can’t tell without knowing QC.
The area enclosed within a pV curve is
A.the work done by the system during one
complete cycle.
B.the work done on the system during one
complete cycle.
C.the thermal energy change of the system
during one complete cycle.
D.the heat transferred out of the system
during one complete cycle.