Exam 1

Question 1

Adiabatic Process

Answer 1

• there is no heat transfer in or out of the system

- when the gas expands the internal energy of the gas decreases

Question 2

Conduction

Answer 2

• the transfer out heat through direct contact with objects that are touching

Ex: food to a pan, pan to the flame

Question 3

Convection

Answer 3

• the transfer of heat through a fluid.

- fluid can be liquids or gases.

Question 4

Radiation

Answer 4

• transfer of heat through space where there are no molecules
• moves in waves

Ex: the sun radiates

Question 5

Absolute temperature

Answer 5

• the temperature of an object on a scale on a scale where zero is taken as the absolute zero

Question 6

Absolute zero

Answer 6

• the temperature of the system is in the state of lowest possible (minimum) energy

Question 7

Stefan- Boltzmann Law

Answer 7

• the amount of energy radiated by an object due to its temp is proportional to its surface area and to the fourth power of its temp

P=e(sigma)(T^4)(A)

Sigma= 5.6703*10^-8

Question 8

Constant pressure process

Answer 8

• isobaric
• work done by an expanding gas with constant pressure
  W= p(change V)

Question 9

Constant volume process

Answer 9

• isochoric process
• if the volume is constant, no movement and no work is done

W=0

Question 10

Isothermal Process

Answer 10

• if the temperature is constant, the pressure varies inversely with the volume

PV=constant temp

• the work done is the area under the curve
  W=NkTln(vf/vi)=nRTln(vf/vi)
• has a constant temperature