Search found 32 matches

by Rohan Chaudhari- 1K
Mon Mar 12, 2018 11:58 pm
Forum: *Organic Reaction Mechanisms in General
Topic: Functional Groups
Replies: 7
Views: 500

Re: Functional Groups

So functional groups are on the final?
by Rohan Chaudhari- 1K
Mon Mar 12, 2018 11:49 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Reaction Mechanism Steps
Replies: 4
Views: 148

Re: Reaction Mechanism Steps

Yes it would be the slow step
by Rohan Chaudhari- 1K
Mon Mar 12, 2018 11:29 pm
Forum: *Nucleophiles
Topic: What are nucleophiles?
Replies: 2
Views: 344

Re: What are nucleophiles?

A nucleophile is a chemical species that donates an electron pair to an electrophile to form a chemical bond in relation to a reaction
by Rohan Chaudhari- 1K
Thu Mar 08, 2018 3:57 pm
Forum: First Order Reactions
Topic: Equation variations
Replies: 9
Views: 402

Re: Equation variations

You can aso use this equation for first order:

[A]=[Ainitial]e^(-k*t)
by Rohan Chaudhari- 1K
Thu Mar 08, 2018 3:56 pm
Forum: Second Order Reactions
Topic: Half Life for First Order vs Second Order
Replies: 5
Views: 372

Re: Half Life for First Order vs Second Order

Half life of first order reactions is linear while for second order it is not
by Rohan Chaudhari- 1K
Thu Mar 08, 2018 3:54 pm
Forum: Method of Initial Rates (To Determine n and k)
Topic: 15.17
Replies: 6
Views: 320

Re: 15.17

Yes you are right. Since C is a zero order, its concetration is ignored when determinining the rate of A and B
by Rohan Chaudhari- 1K
Thu Mar 08, 2018 3:53 pm
Forum: Kinetics vs. Thermodynamics Controlling a Reaction
Topic: Homework Problems
Replies: 3
Views: 183

Re: Homework Problems

Its 1-39 plus some of the integrated problems in the end of the section.
by Rohan Chaudhari- 1K
Sat Mar 03, 2018 4:49 pm
Forum: First Order Reactions
Topic: problem 15.23B
Replies: 3
Views: 140

Re: problem 15.23B

You can also just use [A]=[A]initial * e^-kt, which is just a simplified verision of the ln[A]=-kt+ln[A]initial equation
by Rohan Chaudhari- 1K
Sat Mar 03, 2018 4:46 pm
Forum: Kinetics vs. Thermodynamics Controlling a Reaction
Topic: Kinetics Test/Final
Replies: 2
Views: 107

Re: Kinetics Test/Final

My TA said you should know how to derive them
by Rohan Chaudhari- 1K
Sat Mar 03, 2018 4:43 pm
Forum: General Rate Laws
Topic: 15.27
Replies: 2
Views: 103

15.27

How do you calculate the time it takes for something to get to 15% of its initial concetration and 1/9th of its initial condition if you are given only its half life?
by Rohan Chaudhari- 1K
Sat Feb 24, 2018 5:20 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Galvanic cell set up
Replies: 8
Views: 227

Re: Galvanic cell set up

It's usually on the left, but you can write it on the right.
by Rohan Chaudhari- 1K
Sat Feb 24, 2018 5:01 pm
Forum: Method of Initial Rates (To Determine n and k)
Topic: n
Replies: 8
Views: 250

Re: n

N is the number of moles
by Rohan Chaudhari- 1K
Tue Feb 20, 2018 8:51 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: 14.15a
Replies: 4
Views: 154

14.15a

Why is it AgBr+e- ==>Br- + Ag and not just Br + e- ==> Br-?
by Rohan Chaudhari- 1K
Tue Feb 13, 2018 1:41 am
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Midterm
Replies: 2
Views: 122

Re: Midterm

There is no need to know how to derive anything, but knowing how to derive can be helpful for solving the problems, how the equations relate to one another, and thinking through the problems.
by Rohan Chaudhari- 1K
Tue Feb 13, 2018 1:39 am
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Problem 9.69
Replies: 1
Views: 89

Problem 9.69

For the problem 9.69, do you just multiply the deltaG of the NADH reaction by 3 and divide it by the delta G of the reaction for ATP?
by Rohan Chaudhari- 1K
Tue Feb 13, 2018 1:38 am
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Extensive vs Intensive
Replies: 3
Views: 134

Re: Extensive vs Intensive

An intensive property does not rely on the mass of the substance while an extensive property does.
by Rohan Chaudhari- 1K
Tue Feb 13, 2018 1:36 am
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: delta S(system) vs delta S(surroundings)
Replies: 4
Views: 771

Re: delta S(system) vs delta S(surroundings)

Delta S of the universe must equal 0, which happens in reversible reactions at equilibriums.
by Rohan Chaudhari- 1K
Tue Feb 13, 2018 1:35 am
Forum: Calculating Work of Expansion
Topic: equilbrium = reversible
Replies: 3
Views: 163

Re: equilbrium = reversible

All reactions at equillibrium are reversible as the nature of equilibirums (flow in both directions) requires the reaction to be reversible.
by Rohan Chaudhari- 1K
Sun Feb 04, 2018 12:11 am
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: ΔS(universe)
Replies: 6
Views: 226

Re: ΔS(universe)

Delta S can only be zero in an equilibrium, one way to think about that could be that disorder and order are equal. Likewise, entropy in the universe is always increasing.
by Rohan Chaudhari- 1K
Sun Feb 04, 2018 12:09 am
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Spontaneous
Replies: 14
Views: 385

Re: Spontaneous

Just to add on, spontaneity refers to the fact that the reaction is favored to occur. An example of this concept would be a boulder on a hill, as it would likely roll down the hill.
by Rohan Chaudhari- 1K
Thu Jan 25, 2018 9:21 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Car Engine [ENDORSED]
Replies: 4
Views: 197

Re: Car Engine [ENDORSED]

Since gasoline is inputted into the engine and stuff is also outputted(heat/gas), it is an open system.
by Rohan Chaudhari- 1K
Thu Jan 25, 2018 9:19 pm
Forum: Calculating Work of Expansion
Topic: Units
Replies: 2
Views: 148

Re: Units

1 atm is equal to 760 torr. The unit for P in w=-PdeltaV is usually in atm as the answer to this equation is then usually converted to J using (101.325J/L*atm).
by Rohan Chaudhari- 1K
Thu Jan 25, 2018 9:15 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Question 9.7
Replies: 1
Views: 82

Question 9.7

"Assuming that the heat capacity of an ideal gas is independent of temperature, calculate the entropy change associated with raising the temperature of 1.00 mol of ideal gas atoms reversibly from 37.6 C to 157.9 C at a) constant pressure and b) constant volume" What exactly is the question...
by Rohan Chaudhari- 1K
Sat Jan 20, 2018 2:09 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Ch 8 #53 Part b
Replies: 6
Views: 294

Re: Ch 8 #53 Part b

The reason it is negative is because the temperature raises, meaning that the reaction had to release energy. The reason it is just q=C*deltaT is because it is the equation for the calorimeter, which does not include mass.
by Rohan Chaudhari- 1K
Sat Jan 20, 2018 1:46 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Reversible Processes
Replies: 2
Views: 132

Re: Reversible Processes

A reversible process is one where you can go backwards in the process at any time without increasing entropy. This can only happen during an equilibrium.
by Rohan Chaudhari- 1K
Mon Jan 15, 2018 1:38 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: 8.25
Replies: 1
Views: 122

8.25

The exercise in question- A constant-volume calorimeter was calibrated by carrying out a reaction known to release 3.50 kJ of heat in 0.200L of solution in the calorimeter, (q=-3.50kJ) resulting in a temperature rise of 7.32C. In a subsequent experiment, 100.0 mL of 0.200 M HBr(aq) and 100.0 mL of 0...
by Rohan Chaudhari- 1K
Sun Jan 14, 2018 9:01 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Work vs. Heat
Replies: 6
Views: 254

Re: Work vs. Heat

Work and heat are two different forms of energy transfer. Work is the mechanical transfer of energy while heat is the thermal.
by Rohan Chaudhari- 1K
Sun Jan 14, 2018 8:08 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: living plant
Replies: 4
Views: 171

Re: living plant

A dead plant does not transfer heat with its surroundings so it is not an open loop.
by Rohan Chaudhari- 1K
Sun Jan 14, 2018 2:36 pm
Forum: Calculating Work of Expansion
Topic: Work equations
Replies: 3
Views: 158

Work equations

Can someone please explain what the different work equations are and when you use them? I'm having trouble identifying which to use in the homework.

Go to advanced search