Lecture 13 Enthalpy; Heating Curves

Lecture 13 Enthalpy; Heating Curves - Lec-13: Enthalpy;...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon

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

View Full DocumentRight Arrow Icon

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

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

Unformatted text preview: Lec-13: Enthalpy; Heating Curves Roy A. Lacey, Stony Brook University; Che 131, Spring 2011 1 Systems Roy A. Lacey, Stony Brook University; Che 131, Spring 2011 2 Heat Flow ` In an exothermic process, heat flows from a system into its surroundings. ` In an endothermic process, heat flows from the surroundings into the system. Roy A. Lacey, Stony Brook University; Che 131, Spring 2011 3 Systems A system is characterized by state variables (P, T, V, n) state variables (P, T, V, n) A change in conditions is a A change in conditions is a change of state change of state . Physical change eg gas expansion Physical change (eg. gas expansion) Chemical change (eg. reaction) For chemical systems we focus on the initial For chemical systems we focus on the initial For chemical systems we focus on the initial For chemical systems we focus on the initial and final conditions and final conditions Roy A. Lacey, Stony Brook University; Che 131, Spring 2011 4 System Energy Here ` The internal energy of a system is the sum of all the KE and PE of all of the sum of all the KE and PE of all of the components of the system. Roy A. Lacey, Stony Brook University; Che 131, Spring 2011 5 State Function Why is the state function Why is the state function Why is the state function Why is the state function so important ? so important ? Distance between two cities is a Distance between two cities is a state function , but distance traveled is a path function Roy A. Lacey, Stony Brook University; Che 131, Spring 2011 6 State Functions The internal energy E is a state function...
View Full Document

This note was uploaded on 06/04/2011 for the course CHE 131 taught by Professor Kerber during the Spring '08 term at SUNY Stony Brook.

Page1 / 10

Lecture 13 Enthalpy; Heating Curves - Lec-13: Enthalpy;...

This preview shows document pages 1 - 5. Sign up to view the full document.

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