{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

1stLaw-Closed-Spring2010-6

# 1stLaw-Closed-Spring2010-6 - Energy Equation 1st Law of...

This preview shows pages 1–7. Sign up to view the full content.

Energy Equation 1st Law of Thermodynamics Energy cannot be created or destroyed. (see Conservation of Mass for exception) It can, however, change from one form to another; transfer from one system to another. Energy conservation is a Postulate

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

View Full Document
Closed System In a closed system no mass enters or leaves the system. However, energy can leave as – Work [W] (organized motion) – Heat [Q] (random motion)
1st Law for Closed System dE CM = δ Q - δ W Work done by system (out) +ve Heat supplied to system (in) +ve d - exact differential (state variable) δ - not e. d. (path dependant) Same per mass, per mole. de CM = δ q + δ w d ˆ e CM = δ ˆ q + δ ˆ w

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

View Full Document
Other Forms of 1st Law In rate form: In integral form: dE dt = ˙ Q ˙ W dE = δ Q δ W 1 2 1 2 1 2 Δ E 12 = Q 12 W 12
Applications of 1st Law Constant volume: pdV = 0 only internal energy, E = U dE dt = ˙ Q dU dt = ˙ Q ˙ Q = mc V dT dt U 12 = Q 12 = m c V T 1 T 2 dT

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

View Full Document
Applications of 1st Law
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern