## Search found 29 matches

Fri Mar 15, 2019 3:48 am
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Specific Heat Capacity and Heat Capacity
Replies: 2
Views: 342

### Specific Heat Capacity and Heat Capacity

Why is Specific Heat Capacity an extensive property if it pertains to that individual reaction? Meanwhile heat capacity is an intensive property even though it constantly changes with matter?
Fri Mar 15, 2019 3:45 am
Forum: Second Order Reactions
Topic: Molecularity
Replies: 5
Views: 392

### Re: Molecularity

For example on problem 49 on edition 6, each step has it's own molecularity and order. Step 1 is just taking the reactants HBr and NO2 and multiplying them. Each one has a coefficient of 1 and so individually they have an order of one. However, when added k[HBr][NO2] the order becomes two. This infl...
Fri Mar 15, 2019 3:39 am
Forum: Second Order Reactions
Topic: Molecularity
Replies: 5
Views: 392

### Re: Molecularity

You would still have to find the overall order but they are based on the orders taken from each elementary step.
Fri Mar 15, 2019 3:35 am
Forum: Second Order Reactions
Topic: Molecularity
Replies: 5
Views: 392

### Re: Molecularity

The molecularity would be the same as the overall order.
Fri Mar 15, 2019 3:28 am
Forum: Second Order Reactions
Topic: Problem 51 6th Edition
Replies: 1
Views: 228

### Problem 51 6th Edition

Why is the order one and not two if the overall equation had a coefficient of two?
Fri Mar 15, 2019 3:27 am
Forum: Zero Order Reactions
Topic: Not used Half life
Replies: 8
Views: 424

### Not used Half life

In the 6th edition textbook, there is a table that describes all three orders but on the bottom of zero and second order the half life states not used. What does this mean?
Fri Mar 15, 2019 3:23 am
Forum: General Rate Laws
Topic: k'
Replies: 3
Views: 123

### Re: k'

K' is for the reverse reaction. Just a different direction but still the same concept.
Fri Mar 15, 2019 3:20 am
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Problem 61 6th Edition
Replies: 1
Views: 99

### Problem 61 6th Edition

After finding the activation energy of the two different parts do we add them? If so why?
Fri Mar 15, 2019 3:15 am
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Catalyst vs Intermediate
Replies: 1
Views: 86

### Catalyst vs Intermediate

The difference between the two is that a catalyst is there to begin with and does not get used up. Meanwhile the Intermediate gets formed between the steps of the reaction.
Fri Mar 15, 2019 2:28 am
Forum: Second Order Reactions
Topic: reaction intermediate
Replies: 4
Views: 367

### Re: reaction intermediate

This would be the molecule that you cancel out when combining step 1 and step two because an intermediate is formed.
Fri Mar 15, 2019 1:48 am
Forum: Second Order Reactions
Topic: First Order vs Second Order Reaction Half- Life
Replies: 1
Views: 283

### First Order vs Second Order Reaction Half- Life

When finding seconds for problem 27 in edition 6 it was just finding 1/2^n. Does this change when it is no longer first order? For example in problem 35 edition 6 the same method no longer works? Is it because it is second order?
Thu Mar 14, 2019 11:00 pm
Forum: Second Order Reactions
Topic: Question 13 6th Edition
Replies: 2
Views: 286

### Question 13 6th Edition

When finding initial order for a second order equation which [A] do we use if the gave us H2 and I2?
Fri Mar 08, 2019 3:03 am
Forum: Zero Order Reactions
Topic: Differentiating Zero and One Order Reactions
Replies: 2
Views: 136

### Differentiating Zero and One Order Reactions

Theoretically, since both the graphs of both zero and one would look similar(including the negative in the equation) how do we distinguish them?
Fri Mar 08, 2019 3:00 am
Forum: First Order Reactions
Topic: Second and Zero Order Units
Replies: 2
Views: 123

### Second and Zero Order Units

They are written differently with zero order having moles first and second order having Liters first. Therefore, do they have different units so they must be written in this order or do they have the same regardless of the order?
Fri Mar 08, 2019 2:07 am
Forum: Kinetics vs. Thermodynamics Controlling a Reaction
Topic: Reaction Rate vs Rate of Consumption/Formation
Replies: 3
Views: 152

### Reaction Rate vs Rate of Consumption/Formation

In the third question of the sixth edition book, it had three parts one asks for the reaction rate and the other two asks for the rate of formation. What is the difference between these two because the book does not really give an equation for the reaction rate just for the rate of formation.
Fri Mar 01, 2019 2:29 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: In the 6th Edition in Problem 14.23, Part C
Replies: 1
Views: 96

### In the 6th Edition in Problem 14.23, Part C

For part C what makes the equation non-spontaneous. Does the fact that it only have an anode make it non spontaneous or do we need to solve for deltaG to prove it? However if it is the latter, how do we go about finding the deltaG without the cathode?
Thu Feb 28, 2019 10:41 pm
Forum: Balancing Redox Reactions
Replies: 13
Views: 504

Just to clarify, when balancing an equation one must add H+ or water but never put coefficients in front of the oxidizing/reducing compound. OR can we do both?
Thu Feb 28, 2019 10:39 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Finding n for Galvanic Cell Equations
Replies: 2
Views: 118

### Finding n for Galvanic Cell Equations

Just to clarify, when finding n for the equation deltaG=-nFE cell we must balance the equation and it is the coefficient for the electrons transferred?
Fri Feb 22, 2019 1:21 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Change in Gibbs Free Energy
Replies: 3
Views: 218

### Change in Gibbs Free Energy

What is the difference between deltaG and deltaG with a degree? Like in problem 11.21.
Fri Feb 22, 2019 1:09 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Phase changes and Entropy
Replies: 4
Views: 306

### Phase changes and Entropy

How does the entropy change in a liquid phase as opposed to a gas phase? Which one would have more entropy and why?
Fri Feb 22, 2019 1:06 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Gibs Free Energy and Enthalpy
Replies: 2
Views: 144

### Gibs Free Energy and Enthalpy

How does the negative enthalpy help prove that most spontaneous reactions are exothermic. In other words what are the connections between them?
Fri Feb 08, 2019 2:04 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Entropy Change Due to Temperature Change
Replies: 3
Views: 123

### Re: Entropy Change Due to Temperature Change

SO does this mean that entropy change is the same thing as change in entropy?
Fri Feb 08, 2019 12:33 am
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: 'C' constant
Replies: 2
Views: 87

### Re: 'C' constant

Is it always given? OR can it be solved for? If so what information is required to solve it?
Fri Feb 08, 2019 12:31 am
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: When C, Heat Capacity is not given?
Replies: 1
Views: 40

### When C, Heat Capacity is not given?

For problem 9.3 the formula for change in temperature is needed but how are we suppose to find Heat Capacity when the number of moles are not given? Without the moles the formula for solving C is not possible.
Thu Jan 31, 2019 7:05 pm
Forum: Calculating Work of Expansion
Topic: Problem 8.27
Replies: 2
Views: 101

### Problem 8.27

I understand when to use each equation but the problem is not offering the number moles to solve a reversible equation. Is there a way to solve without the moles given?
Thu Jan 31, 2019 5:28 pm
Forum: Calculating Work of Expansion
Topic: Homework Problem 8.3 Question
Replies: 1
Views: 99

### Homework Problem 8.3 Question

I do not understand how the inner diameter and the amount of depression helps us solve for the change in volume?
Fri Jan 18, 2019 2:17 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Equations with Salt
Replies: 2
Views: 103

### Equations with Salt

Would a salt disassociate completely? Or only partially?
I do not really understand how that effects which molecules to include in the equilibrium equation?
Fri Jan 18, 2019 2:13 pm
Forum: Ideal Gases
Topic: The Difference between Q and Kc [ENDORSED]
Replies: 18
Views: 1751

### The Difference between Q and Kc[ENDORSED]

What is the difference between the two, in terms of comparing them if they have the same formula? What does the comparison entail?
Fri Jan 18, 2019 2:11 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: An Equation with both Weak Acids and Salt
Replies: 1
Views: 96

### An Equation with both Weak Acids and Salt

When do we know to change the X to zero so that we do not have to do the quadratic formula?
Does this change when there is now multiple reactions happening as in a solution that has a weak acid and salt that disassociates.