Search found 29 matches

by Samantha Jimenez 4k
Fri Mar 15, 2019 4:35 am
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Specific Heat Capacity and Heat Capacity
Replies: 2
Views: 123

Re: Specific Heat Capacity and Heat Capacity

specific heat capacity is an intensive property and not the other way around for that reason.
by Samantha Jimenez 4k
Fri Mar 15, 2019 4:33 am
Forum: Reaction Mechanisms, Reaction Profiles
Topic: rate constant
Replies: 1
Views: 18

rate constant

"Increasing the concentration of a reactant increases the rate of a reaction by increasing the rate constant in the forward direction"
Would this statement be false?? If so, could someone explain why that is?
by Samantha Jimenez 4k
Fri Mar 15, 2019 4:28 am
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Rate constant for large equilibrium constant
Replies: 1
Views: 20

Rate constant for large equilibrium constant

For a reaction with a very large equilibrium constant, would the rate constant of the forward reaction be much larger than the rate constant of the reverse reaction?
by Samantha Jimenez 4k
Fri Mar 15, 2019 4:27 am
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Rate constants at equilibrium
Replies: 5
Views: 63

Rate constants at equilibrium

At equilibrium, would the rate constants of the forward and reverse reactions be equal?
by Samantha Jimenez 4k
Fri Mar 15, 2019 3:40 am
Forum: Second Order Reactions
Topic: Molecularity
Replies: 5
Views: 98

Re: Molecularity

Could you give an example as to how we would use the orders from the elementary steps to get the molecularity?
by Samantha Jimenez 4k
Fri Mar 15, 2019 3:37 am
Forum: Second Order Reactions
Topic: Molecularity
Replies: 5
Views: 98

Re: Molecularity

could you clarify what you mean by overall order? so can we avoid the elementary steps and just look at the overall order if it is given?
by Samantha Jimenez 4k
Fri Mar 15, 2019 3:34 am
Forum: Second Order Reactions
Topic: Molecularity
Replies: 5
Views: 98

Molecularity

In my notes, I have that the molecularity is based on the number of species in an elementary step but would it be different if the order of those individual species was something other than 1?
by Samantha Jimenez 4k
Fri Mar 15, 2019 3:19 am
Forum: General Rate Laws
Topic: k'
Replies: 3
Views: 42

k'

so what exactly is k' and how is it used to find the overall k?
by Samantha Jimenez 4k
Fri Mar 15, 2019 3:08 am
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: activation energy
Replies: 3
Views: 48

activation energy

How would we find the activation energy, given both rate constants and temperatures?
by Samantha Jimenez 4k
Fri Mar 15, 2019 2:26 am
Forum: Second Order Reactions
Topic: reaction intermediate
Replies: 4
Views: 98

reaction intermediate

For one of the homework problems, it gives the elementary steps and asks what the reaction intermediate is, what exactly would this be?
by Samantha Jimenez 4k
Fri Mar 15, 2019 1:51 am
Forum: Second Order Reactions
Topic: First Order vs Second Order Reaction Half- Life
Replies: 1
Views: 73

Re: First Order vs Second Order Reaction Half- Life

you have to take the half-life to the 4th power
by Samantha Jimenez 4k
Thu Mar 14, 2019 11:49 pm
Forum: Second Order Reactions
Topic: Question 13 6th Edition
Replies: 2
Views: 96

Re: Question 13 6th Edition

to find the initial reaction rate, you would just multiply the molarity of all the reactants times the k that they provided.
by Samantha Jimenez 4k
Fri Mar 01, 2019 10:20 am
Forum: Balancing Redox Reactions
Topic: Max Potential
Replies: 3
Views: 59

Max Potential

Could someone explain a bit more the concept of max potential and how that gives you the cell potential? I'm confused as to how they relate.
by Samantha Jimenez 4k
Fri Mar 01, 2019 5:33 am
Forum: Balancing Redox Reactions
Topic: Metals
Replies: 2
Views: 41

Metals

Why is it that metals are better conductors of electricity????
by Samantha Jimenez 4k
Fri Mar 01, 2019 5:31 am
Forum: Balancing Redox Reactions
Topic: Strength of reducing agent
Replies: 10
Views: 189

Strength of reducing agent

For one of the homework problems, it asks to rank metals of increasing strength of reducing agent. How would we go about answering these type of questions?
by Samantha Jimenez 4k
Thu Feb 21, 2019 4:23 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Gibbs Free Energy and Spontaneity
Replies: 2
Views: 53

Gibbs Free Energy and Spontaneity

Could a reaction have a negative delta g and favor reactants or would it always favor the products?
by Samantha Jimenez 4k
Thu Feb 21, 2019 3:43 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Units of Delta G
Replies: 5
Views: 76

Units of Delta G

What would be the units of Gibbs Free energy?
by Samantha Jimenez 4k
Thu Feb 21, 2019 3:33 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: 9.53 Homework Problem
Replies: 1
Views: 23

9.53 Homework Problem

9.53 Calculate the change in molar Gibbs free energy for the process NH3(l) S NH3(g) at 1 atm and (a) 15.0 C; (b) 45. C (see Tables 8.3 and 9.1). In each case, indicate whether vaporization would be spontaneous. I'm confused as to how would we approach this question? Would we just be getting values ...
by Samantha Jimenez 4k
Fri Feb 15, 2019 5:26 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Specific Heat capacity
Replies: 2
Views: 68

Specific Heat capacity

Still confused as to why specific heat capacity is intensive if the equation includes moles. Could someone explain this?
by Samantha Jimenez 4k
Fri Feb 15, 2019 5:21 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: HW Problem 9.5
Replies: 2
Views: 69

HW Problem 9.5

9.5 What is the total entropy change of a process in which 40.0 kJ of energy is transferred as heat from a large reservoir at 800. K to one at 200. K?

For this question, would we just be finding the change in entropies for each and then adding them together?
by Samantha Jimenez 4k
Thu Jan 31, 2019 2:16 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: HW 8.11 part b
Replies: 2
Views: 56

HW 8.11 part b

A piston confines 0.200 mol Ne(g) in 1.20 L at 25 C. Two experiments are performed. (a) The gas is allowed to expand through an additional 1.20 L against a constant pressure of 1.00 atm. (b) The gas is allowed to expand reversibly and isothermally to the same final volume. Which process does more wo...
by Samantha Jimenez 4k
Thu Jan 31, 2019 12:35 pm
Forum: Phase Changes & Related Calculations
Topic: HW problem 8.5
Replies: 3
Views: 59

HW problem 8.5

A gas sample in a cylinder is supplied with 524 kJ of energy as heat. At the same time, a piston compresses the gas, doing 340 kJ of work. What is the change in internal energy of the gas during this process? For this problem is the 524kJ the initial energy and the 340kJ just the change? so would th...
by Samantha Jimenez 4k
Thu Jan 31, 2019 11:29 am
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: 8.1 part c
Replies: 1
Views: 29

8.1 part c

can anybody help me understand what type of system would a bomb calorimeter in which benzene is burned would be?
by Samantha Jimenez 4k
Fri Jan 25, 2019 8:14 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Standard enthalpy of formation
Replies: 2
Views: 45

Re: Standard enthalpy of formation

The standard enthalpy is the standard heat/energy required to form one mole of a substance in its most stable form and that value is zero which makes sense because its already in its most stable form.
by Samantha Jimenez 4k
Fri Jan 25, 2019 7:57 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Stable carbon
Replies: 3
Views: 56

Stable carbon

Could someone explain how graphite is the most stable form of carbon?
by Samantha Jimenez 4k
Fri Jan 25, 2019 7:48 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: An element's standard state
Replies: 2
Views: 41

Re: An element's standard state

If I'm right, I believe most reactions are given in their standard state
by Samantha Jimenez 4k
Fri Jan 18, 2019 3:21 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: When is X negligible.
Replies: 6
Views: 79

When is X negligible.

So I'm still pretty confused as to when we should know when x can be disregarded in the denominator for the quadratic equation in an ICE problem. Is it safer to just never disregard it, or are there exceptions when it is acceptable?
by Samantha Jimenez 4k
Fri Jan 18, 2019 3:14 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: ICE
Replies: 5
Views: 97

Re: ICE

X is the change in concentration from reactants to products, thus, the reactant's end concentration would be its initial-change(which is x), the products, on the other hand, are just x since they are equal to the change in concentration from the reactant.
by Samantha Jimenez 4k
Fri Jan 18, 2019 3:07 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: ICE table
Replies: 2
Views: 42

ICE table

When constructing the ICE table, if there is a coefficient in front of the products, do we include that number in the quadratic, or solve for x and then multiply it by the coefficient afterward?

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