You have 1 kg ice (at 0o C) in a well-insulated container. How much boiling water must be added to produce only water at 0o C. Lf 3.33x105 J/kg

Lv 2.26x106 J/kgc ice 2090 J/kg·oC

water 4186 J/kg·oC steam 2010 J/kg·oC

If the ice starts out at -20o what do I change?

If the water starts out at as steam at 100o

what do I change?

Conduction

Energy moves but matter does not move

Thermal Energy Transfer: Zeroth Law

HOT COLD

LTT

kAP ch

Convection Movement of hot

or cold matter Air currents or

water currents

Energy and matter move

Thermal Energy Transfer

HOT

Thermal Energy TransferRadiation Long range Electromagnetic

waves Visible, Infrared

Energy moves but matter does not move

HOT

First Law of Thermodynamics

Work done on the gas

Work done on the gas

f

i

V

V

PdVWork

P

V

In the path shown, the work done on the gas is

A. NegativeB. PositiveC. Zero

isobaric

P

V

In the paths shown below which process is work the largest (in magnitude)?

A. RedB. BlueC. They are the same

P

V

In the paths shown below which process is work the largest (in magnitude)?

A. RedB. BlueC. They are the same

P

V

In the path shown, the work done on the gas is

A. NegativeB. PositiveC. Zero

isovolumetric

P

V

In the path shown, the work done on the gas is

A. NegativeB. PositiveC. Zero

startend

cyclic

State Dependent vs.

Path Dependent

Plug and chug through life

Some common processes Isobaric

Some common processes Isovolumetric

Some common processes Isothermal

Some common processes Adiabatic – no REALLY adiabatic

Some common processes Free expansion