Kc, Kp And Gibbs

Question 1

Kc equation

Answer 1

Kc = [products] to the power of no of moles / [reactants] to the power of no of moles

Question 2

Put 2A + 3B <—> 7C + D
Into a Kc equation

Answer 2

Kc = [C] ^7 x [D] / [A] ² x [B] ^3

Question 3

What are the units of the things inserted into the Kc equation

Answer 3

Mol dm-3

Question 4

How do you calculate untis for Kc

Answer 4

Place them in the fraction if something is to the power of 2 they have 2 units or 3 units if to the power of 3 etc

Question 5

Mole fraction equation

Answer 5

Number of moles of a species / total number of moles

Question 6

Partial pressure equation

Answer 6

Mole fraction of a species of gas x overall pressure

Question 7

Kp equation

Answer 7

Same as Kc

Question 8

Unit of things place in Kp equation

Answer 8

ATM

Question 9

Calculating units for Kp

Answer 9

Same process as for Kc

Question 10

Gibbs equilibrium eq

What each thing stands for and units

Answer 10

/\G = - RTlnK

R = gas constant (8.31 J K-1 mol-1)
T = kelvin (k)
K = equilibrium constant (no units)
Ln = natural logarithm

Question 11

The greater the Kc the grater products or reactant concentration in equ

Answer 11

Products

Question 12

What does Kln rearrange to

Answer 12

K = e ^ - x/x

Question 13

Homogenous system

Answer 13

All components are in the same state

Question 14

Heterogenous system

Answer 14

At least 2 different states

Question 15

What states are used in Kc and Kp

Answer 15

Only gases
No liquids, solids or aqueous solutions

Question 16

What is Kp an expression of

Answer 16

Where concentration os reactants and products are expressed in terms of their partial pressure

Question 17

What does Gibbs free energy express

Answer 17

Shows if a reaction is feasible at T is related to Kc.
A description of how far a reaction will go towards the products at equilibrium

Question 18

For all spontaneous processes /\G must be..

Answer 18

Negative