MAE 201 Test 2 Questions With Correct
Answers
Change in Energy for a cycle - CORRECT ANSWER✔✔-delta U for a cycle
| | | | | | | | | | | | |
=0 | |
therefore Qnet=Wnet |
Equation for change in energy of a closed system - CORRECT
| | | | | | | | | | |
ANSWER✔✔-deltaU=Qnet-Wnet
Boundary Work Equation - CORRECT ANSWER✔✔-P(v2-v1)
| | | | |
Boundary Work Sign Conventions - CORRECT ANSWER✔✔-+ when
| | | | | | | |
volume increases|
- when volume decreases
| | |
Boundary Work for a constant Volume Process - CORRECT ANSWER✔✔-
| | | | | | | | |
Boundary Work= 0 | |
Temperature decreases for ideal gas b/c of Pv=RT
| | | | | | |
, Boundary Work for a constant pressure process - CORRECT
| | | | | | | | |
ANSWER✔✔-P(v2-v1) when v is specific volume (per unit mass) OR | | | | | | | | | |
Volume
Boundary work for said process is negative because it is done ON system
| | | | | | | | | | | |
Boundary Work for an Ideal Gas @ constant Temperature - CORRECT
| | | | | | | | | | |
ANSWER✔✔-mRTln(v2/v1)
OR |
mRTln(P1/P2)
Polytropic Processes N values - CORRECT ANSWER✔✔-Constant
| | | | | | |
Pressure n=0 |
Constant Volume n= infinity
| | |
Isothermal/ Ideal Gas n=1 | | |
Adiabatic/ Ideal Gas n= Cp/Cv| | | |
Boundary Work for Polytropic Processes - CORRECT ANSWER✔✔-When
| | | | | | | |
n does not equal 1
| | | | |
Wb= (P2V2-P1V1)/1-n
|
When n=1 |
Wb=PVln(V2/V1)
Answers
Change in Energy for a cycle - CORRECT ANSWER✔✔-delta U for a cycle
| | | | | | | | | | | | |
=0 | |
therefore Qnet=Wnet |
Equation for change in energy of a closed system - CORRECT
| | | | | | | | | | |
ANSWER✔✔-deltaU=Qnet-Wnet
Boundary Work Equation - CORRECT ANSWER✔✔-P(v2-v1)
| | | | |
Boundary Work Sign Conventions - CORRECT ANSWER✔✔-+ when
| | | | | | | |
volume increases|
- when volume decreases
| | |
Boundary Work for a constant Volume Process - CORRECT ANSWER✔✔-
| | | | | | | | |
Boundary Work= 0 | |
Temperature decreases for ideal gas b/c of Pv=RT
| | | | | | |
, Boundary Work for a constant pressure process - CORRECT
| | | | | | | | |
ANSWER✔✔-P(v2-v1) when v is specific volume (per unit mass) OR | | | | | | | | | |
Volume
Boundary work for said process is negative because it is done ON system
| | | | | | | | | | | |
Boundary Work for an Ideal Gas @ constant Temperature - CORRECT
| | | | | | | | | | |
ANSWER✔✔-mRTln(v2/v1)
OR |
mRTln(P1/P2)
Polytropic Processes N values - CORRECT ANSWER✔✔-Constant
| | | | | | |
Pressure n=0 |
Constant Volume n= infinity
| | |
Isothermal/ Ideal Gas n=1 | | |
Adiabatic/ Ideal Gas n= Cp/Cv| | | |
Boundary Work for Polytropic Processes - CORRECT ANSWER✔✔-When
| | | | | | | |
n does not equal 1
| | | | |
Wb= (P2V2-P1V1)/1-n
|
When n=1 |
Wb=PVln(V2/V1)
