Lecture_04_02_01_2012

Lecture_04_02_01_2012 - Heat Ron Reifenberger R R f b Birck...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
eat Heat Ron Reifenberger Birck Nanotechnology Center Purdue University February 1, 2012 Lecture 4 1
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
What is Heat? Up until the early 1800’s, heat was thought to be an invisible fluid that flowed out of one object and into nother Now we know that heat energy is another. Now we know that heat energy is associated with the motion of molecules and atoms inside an object. misconception 2
Background image of page 2
Misconception If heat is a fluid, will we eventually run out of it, like when we pour water from a bucket? In fact, heat continues to flow orever as long as a temperature forever as long as a temperature difference is maintained. Heat vs. Temperature? 3
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
ifference between Heat and Temperature? Difference between Heat and Temperature? Temperature is a quantitative measure of “hotness” or “coldness”. emperature also tells us which way Temperature also tells us which way heat flows Heat is a measure of total thermal energy; heat can be transferred from gy; f f a hot object to a cold object Heat flow (Be able to distinguish between two closely related concepts) 4
Background image of page 4
The General Heat Flow Problem m T , m Before T 1 , m 1 2 2 assume T 1 > T 2 T f , m 1 T f , m 2 After touching Heat Flow Q hat’s T Assume energy is conserved – no heat lost to surroundings What s T f ?
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 20

Lecture_04_02_01_2012 - Heat Ron Reifenberger R R f b Birck...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online