CHEMISTRY COMMUNITY

Giselle1B

Also in Free Expansion, w is equal to 0. In this case, deltaH will also be equal to H.

Giselle1B

Zero Order also has a negative slope. Think of the equations as mx+b. The Slope (mx) is similar to kt in the order process formulas.

Giselle1B

"I initially decided to write jokes about the Periodic Table, but never really felt I was in my element."

Giselle1B

delta h is related to q when work is not involved and there is a constant pressure.

Giselle1B

"In a sports relay race, a chemical kinetics specialist runs slowly, and his group loses the race. When the chemical kinetics specialist is asked why he ran slowly, his reply was 'I always wanted to be the significant rate determining step.'

Giselle1B

For C, I believe its true because a catalyst just lowers the activation energy but it does not change the pathway.

Giselle1B

What does it mean when ATP hydrolysis is coupled with an element? do you divide the element's gibbs free energy by th ATP's gibbs free energy to get how many molecules are used of ATP?

Giselle1B

Typically, we interchange between two reactions for heating curves:
1. q=mc*deltaT (within a phase)
2. q= n*deltah (the change from one phase to another)

Giselle1B

If Silver Surfer and Iron Man team up, they'd be alloys.

Giselle1B

I would tell another chemistry joke...
...but all the good ones Argon.

Giselle1B

When a question asks to solve the internal energy of a bomb Calorimeter, do we just assume that delta U is equal to q and thus ignore work?

Giselle1B

What is psuedo first Order and how is it related to the first order process?

Giselle1B

"What should you do if no one laughs at your chemistry jokes?"
-"Keep telling them until you get a reaction."

Giselle1B

How do you know which experiments to use in order to solve an element's overall order?

Giselle1B

What subjects should we focus on for test 2? I know that we have to study gibbs free energy and balancing redox reactions but what about entropy and enthalpy?

Giselle1B

Why do you need the largest positive voltage as an answer for half reactions?

Giselle1B

According to Lavelle's lecture the Van't Hoff equation "can be used to calculate k [equilibrium] at a different temperature if delta H is known."
The equation is lnk=(-delta h/RT) + (delta S/R). The Detla H and S are both in standard state.

Giselle1B

Cp means constant pressure and Cv means constant volume. They are both associated with molar heat capacity of an ideal gas. Cv=(3/2)(R) and Cp=(5/2)R. R is 8.314J/mol*k

Giselle1B

A heat curve demonstrates that steam has higher heat energy. Even though both vapor and boiling water may have the same temp, additional heat energy is required for the phase change to occur (vaporization). Therefore steam would burn more.

Giselle1B

What are all the formulas associated to finding work and how do you know which one to use?

Giselle1B

For Hess' law, think of it as manipulating equations in order to add up their delta H's. Here is a link to a video that explains it way better than me: https://www.youtube.com/watch?v=2q2u5sj4V00.

Giselle1B

Are there any constant numbers we have to know for formulas of heat and work? If so, can someone explain them to me. Thank you.

Giselle1B

Qv is heat in constant volume and qp is heat in constant pressure. Typically, the questions will ask you specifically which one to solve by.

Giselle1B

I was wondering if we have to know how to convert Kp to Kc and vice versa? If so, is there a certain formula that can help convert them. Thank you!

Giselle1B

Since acids and bases follow the conjugate seesaw, I believe that the strongest conjugate acid will tie to the weakest base. I suggest first writing the conjugate acids in increasing order. Then the reverse pattern will tell you the increasing strength of its bases.

Giselle1B

From what i searched up, all alkalines can be basic but not all bases are alkaline. Alkalines are bases that dissolve in water. Bases are water solutions of any chemicals that contain a lower hydrogen ion concentration than pure water. Here's the link to an article that defines it better: https://sc...

CHEMISTRY COMMUNITY

Search found 26 matches

Re: Work in a System

Re: Slopes of a plot

Re: Post All Chemistry Jokes Here

Re: delta h and q

Re: Post All Chemistry Jokes Here

Re: HW 7E.7

ATP Coupling

Re: heating curves

Re: Post All Chemistry Jokes Here

Re: Post All Chemistry Jokes Here

Bomb Calorimeter

Psuedo First Order

Re: Post All Chemistry Jokes Here

Which Experiment to Use

Test 2 Material

Voltage and Balancing Redox Equations

Re: Van't Hoff Equation

Re: Cp vs Cv

Re: Steam vs. Boiled Water

Work Equations

Re: Hess's Law

Constant numbers

Re: qv vs qp

Kp and Kc Conversions

Re: Help on 12.45

Re: Basic vs. Alkaline