{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

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

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 Document Right 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 are tabulated – calculate heat q = nC p Δ T = mC sp Δ
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.

{[ snackBarMessage ]}