Bagdanavicius

Question 1

What is an isothermal process?

Answer 1

A process during which the temperature remains constant

Question 2

What is an isobaric process?

Answer 2

A process during which the pressure remains

constant

Question 3

What is an isochoric process?

Answer 3

A process during which the specific volume remains

constant

Question 4

What is a cycle?

Answer 4

A process during which the initial and final states are identical

Question 5

What is the zeroth law of thermodynamics?

Answer 5

If two bodies are in thermal equilibrium with a third body, they are also in thermal equilibrium with each other

Question 6

What is the definition for heat?

Answer 6

The form of energy interaction between two systems or a system and its surroundings due to temperature difference

Question 7

Qin and Wout, of a system are?

Answer 7

Positive

Question 8

Qout and Win, of a system are?

Answer 8

Negative

Question 9

What is the equation for energy balance?

Answer 9

(Total energy entering) - (Total energy leaving) = (Change in the total energy)

Question 10

What is saturation temperature?

Answer 10

The temperature at which a pure substance changes phase at a given pressure

Question 11

What is saturation pressure?

Answer 11

The pressure at which a pure substance changes phase at a given temperature

Question 12

What is the equation of state for an ideal gas

Answer 12

Pv = RT

Question 13

For expansion, is boundary work positive or negative?

Answer 13

Positive

Question 14

For compression, is boundary work positive or negative?

Answer 14

Negative

Question 15

For polytrpoic process’, what is the equation for boundary work?

Answer 15

P2V2 - P1V1/ 1-n

Where n is the heat ratio = Cp/Cv

Question 16

For isothermal process’, what is the equation for boundary work?

Answer 16

PVln(V2/V1)

n = 1

Question 17

For isobaric process’, that is the equation for boundary work?

Answer 17

Po(V2-V1)

Question 18

What is the specific heat at constant volume? (Cv)

Answer 18

The energy required to raise the temperature of the unit mass of a substance by one degree as the volume is maintained constant

Question 19

What is the specific heat at constant pressure? (Cp)

Answer 19

The energy required to raise the temperature of the unit mass of a substance by one degree as the pressure is maintained constant

Question 20

What is Cv related to? And what is the equation?

Answer 20

The change in internal energy with temperature, at a constant volume
Cv = (du/dT)v

Question 21

What is Cp related to? And what is the equation?

Answer 21

The change in enthalpy with temperature, at a constant pressure
Cp = (dh/dT)p

Question 22

What is the equation for enthalpy?

Answer 22

h = u + Pv

Question 23

For real gases, why do their specific heat only depend on temperature?

Answer 23

At low pressures, all real gases approach ideal-gas behaviour

Question 24

What is the equation for the specific heat ratio?

Answer 24

Cp/Cv

Question 25

What is the conservation of mass principle for a control volume? (2)

Answer 25

Min - Mout = dMcv

M:in -M:out = dMcv/dt

Question 26

What is the Mass Balance for Steady-Flow Processes?

Answer 26

M:in = M:out

Question 27

What is the equation for flow work?

Answer 27

Wflow = Pv
P = pressure, V = volume

Question 28

What is a nozzle?

Answer 28

A nozzle is a device that increases the velocity of a

fluid at the expense of pressure

Question 29

What is a diffuser?

Answer 29

A diffuser is a device that increases the pressure of

a fluid by slowing it down