lec2 - Announcements Lab started Monday ! Discussion has...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Announcements • Lab started Monday !!! • Discussion has also already started !!! • CR0 section see head TA Slava after class • drop + re–add = disaster • Head TA office hours: W 11–12 Chem 161 Last Time • First Law of Thermodynamics Δ U = q + w – heat emitted q heat + heat absorbed – work delivered w work + work accepted • Know q and w calculate Δ U Heat q • Unit of heat: calorie – 1 cal = amount of energy required to heat 1 g of H 2 O by 1 ° C • Standard S.I. Unit: Joule – 1 cal = 4.184 J • Different materials heat differently
Background image of page 1

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

View Full DocumentRight Arrow Icon
2 Basis for Comparison • Heat capacity = heat supplied / temp. rise c p = • Officially: heat required to raise T by 1 ° C • Units: J / ° C or J / K • Poor measure: Extensive property q Δ T Better Estimates • Molar heat Capacity: C p C p = • Specific heat Capacity: C sp C sp = • Both C p and C sp are intensive properties q n Δ T q m Δ T J mol ° C J g ° C Uses of C p and C sp • C p and C sp
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/02/2010 for the course CHE 34466 taught by Professor Chatlier during the Spring '10 term at École Normale Supérieure.

Page1 / 5

lec2 - Announcements Lab started Monday ! Discussion has...

This preview shows document pages 1 - 3. Sign up to view the full document.

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