1b

Question 1

Types of K.E. motion

Answer 1

Translations
Rotations
Vibrations

Question 2

Where are positive and negative charges found in regards to the nucleus?

Answer 2

Positive- in the nucleus

Negative- around the nucleus

Question 3

Does a change in bonding change the potential energy?

Answer 3

Yes

Question 4

What does bonding theory show changes potential energy?

Answer 4

1. Phase changes (intermolecular bond changes)

2. reactions (intramolecular bond changes)

Question 5

Factors that affect the rate of thermal energy transfer?

Answer 5

1. Distance from thermal eq (when distance increases, thermal transfer increases(Joules/sec))
2. Surface area (more =more)

Question 6

Explain

W=-P(ext)🔼V

-p external multiplied by delta v

Answer 6

W - is the amount of work transferred

🔼V - the change in volume

P(ext) - external pressure

Question 7

Which of these values is a state function?

🔼E = q+w

Answer 7

🔼E

Question 8

How do you calculate the efficiency of something

Answer 8

Efficiency = transferred desired energy / energy paid for

=what you wanted / what you paid for it

Question 9

Define exergy

Answer 9

Exergy efficiency = 100 * ( w actual / w max)

Question 10

What is the difference between exergy efficiency and energy efficiency

Answer 10

Exergy is how close the amount of work is to the max work .

Energy efficiency is how much work you got vs how much you paid for

Question 11

Define adiabatic

Answer 11

An adiabatic change is one where q=0. We can force a change to be a change to be adiabatic by insulting it

Question 12

Equation for obtaining explosive work max

Answer 12

=delta h (1 - (T cold / T hot)

Question 13

Two ways of increasing the temp of a gas?

Answer 13

1. Increase p

2. Heat gas

Question 14

Would Energy transferred as heat at constant pressure be the same as if you calculated delta h using delta h formations? Why or why not?

Answer 14

Yes because qp = delta H

Question 15

4 strokes of a gasoline engine?

Answer 15

1. Intake
2. Compression
3. Combustion
4. Exhaust

Question 16

Are compressor blades in front of the combustion chamber or after?

Answer 16

In front

Question 17

On jet planes is the combustion steady or intermittent

Answer 17

Steady

Question 18

What is required to generate an electrical current

Answer 18

Rotating elections which create an election flow

Question 19

Inputs of a gas turbine?

Answer 19

1. air

2. Natural gas / liquid fuel

Question 20

What is the heart of a gas turbine power plant?

Answer 20

The gas turbine

Question 21

What happens to temp when air is compressed?

Answer 21

Increases

Question 22

Is fuel injected before or after the compression of air in a gas turbine?

Answer 22

After

Question 23

Where is the chemical energy converted to mechanical energy in a gas turbine?

Answer 23

When the turbine blades are forced to spin

Question 24

What makes a drive shaft rotate

Answer 24

The expanding gas

Question 25

What do you need to turn mechanical energy of the generator drive shaft into electrical energy?

Answer 25

A magnet surrounded by copper wire

Question 26

What design feature improved the efficiency of the gas turbine gaining 50% more power?

Answer 26

Combined cycle power plant