## Search found 4 matches

Sun Feb 11, 2018 10:07 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Work not a state function [ENDORSED]
Replies: 2
Views: 189

### Work not a state function[ENDORSED]

Why is work done by a system not a state function?
Sun Feb 11, 2018 10:05 pm
Forum: Van't Hoff Equation
Topic: Reaction Coefficient, Q
Replies: 2
Views: 251

### Reaction Coefficient, Q

On page 431 of the textbook it introduces the formula for the reaction coefficient:
Q = [(a subC)^c x (a subD)^d]/ [(a subA)^a x (a subB)^b] . What does this equation tell us, when is it useful, and what do the variables stand for? The book did not explain this well.
Sun Feb 11, 2018 9:58 pm
Forum: Third Law of Thermodynamics (For a Unique Ground State (W=1): S -> 0 as T -> 0) and Calculations Using Boltzmann Equation for Entropy
Topic: Equilibrium and entropy
Replies: 1
Views: 139

### Re: Equilibrium and entropy

When delta S total = 0, delta G must also = 0 according to the equation: delta G= -T(delta S total). Both variables equal 0 when the reaction is at equilibrium. Chemical systems in equilibrium are reversible.
Fri Jan 12, 2018 12:43 pm
Forum: Phase Changes & Related Calculations
Topic: Heat and work not state functions
Replies: 7
Views: 403

### Heat and work not state functions

Hi,
In the textbook it states that internal energy of a system is a state function because it is constant in its current state. Why then are work and heat not considered to be state functions?

(Ryan MacDougall 14B 2C)