Chapter 3- Thermodynamics

Question 1

Zeroth law of thermodynamics

Answer 1

If a=b and b=c then a=c

Question 2

Third law of thermodynamics

Answer 2

Entropy of a perfectly organized crystal of absolute zero is zero

Question 3

Convert kelvin and Celsius

Answer 3

K = C + 273

Question 4

What is body temp (98.6F) in Celsius?

Answer 4

37C

Question 5

How does temperature change length?

Answer 5

Higher temp- increase in length. Lower temp- decrease in length.
🔺L = aL🔺T

Question 6

Thermal expansion for liquids (volume) but it’s also applicable to solids

Answer 6

🔺V = BV🔺T

B= 3a

Question 7

Change in internal energy

Answer 7

🔺U = Q - W

Q- energy transferred into system as heat
W- work done by system

Question 8

Work done by vs on system

Answer 8

By system- expansion

On system- compression

Question 9

Conduction

Answer 9

Direct transfer of energy from molecule to molecule through molecular collisions

Question 10

Convection

Answer 10

Transfer of heat by the physical motion of a fluid over a material

Question 11

Radiation

Answer 11

Transfer of energy by electromagnetic waves. Can transfer energy through a vacuum.

Question 12

Specific heat of water

Answer 12

1 cal/gK = 4.184 J/gK

Question 13

Heat added it removed during phase change

Answer 13

q= mL

Question 14

Isothermal equation

Answer 14

Q = W
(🔺U = 0)

Question 15

Adiabatic equation

Answer 15

🔺U = -W

Question 16

Isovolumetric equation

Answer 16

🔺U = Q

W=0

Question 17

Calculating change in entropy

Answer 17

🔺S = Qrev / T v

Qrev- heat gained or lost in a reversible process

Question 18

Celsius and Fahrenheit

Answer 18

1C = 1.8F