CHEMISTRY COMMUNITY

Jonny Schindler 1A

If you know the spontaneity then you can possibly use the change in moles to assume the enthalpy. I don't think this would ever come up though

Jonny Schindler 1A

So does an increased concentration of an aqueous catalyst increase the rate of the reaction?

Jonny Schindler 1A

I think relating big K to the forward and reverse reactions is the only way to connect them.

Jonny Schindler 1A

if a reaction is thermodynamically favorable doesn't occur because of kinetics, it is a kinetics controlled reaction.

Jonny Schindler 1A

When are we going over mechanisms?

Jonny Schindler 1A

How do you get the overall order of a reaction?

Jonny Schindler 1A

Which order do we put the aqueous products in if there are multiple?

Jonny Schindler 1A

Is there a quick way to assume the sign of the Ecell?

Jonny Schindler 1A

Does anyone know when to use a comma in the cell diagrams?

Jonny Schindler 1A

When delta G is zero the equation is at equilibrium so K=1.

Jonny Schindler 1A

And a negative enthalpy change and positive entropy change increase the spontaneity.

Jonny Schindler 1A

if you can assume the sign of the enthalpy and entropy you can sometimes use that to determine the sign of delta G.

Jonny Schindler 1A

I believe W is the number of molecules to the power of the number of micro states

Jonny Schindler 1A

Conceptually, how does a change in temperature effect the equilibrium concentrations?

Jonny Schindler 1A

They have a greater number of micro-states, or W in the fundamental entropy equation

Jonny Schindler 1A

Can anyone provide an example of using this equation?

Jonny Schindler 1A

Whichever substance's reduction has the highest potential.

Jonny Schindler 1A

The standard entropy of fusion is the standard enthalpy of fusion over the melting point

Jonny Schindler 1A

Once you do each, just add the two to get the total change in entropy

Jonny Schindler 1A

A positive entropy will always make a reaction more favorable. The temperature can only change by how much.

Jonny Schindler 1A

When volume is constant, changes in pressure/temperature result in a change in entropy

Jonny Schindler 1A

Is this also true for the small amounts of steam that escape even before the boiling point is reached?

Jonny Schindler 1A

Will we always be given the standard state of each species when we are expected to use the enthalpy of formation to calculate the enthalpy change?

Jonny Schindler 1A

There will usually be one clear method to used based on the information provided by the problem. If Hess's method can be used, it is the most accurate method.

Jonny Schindler 1A

Can you tell if a reaction is endo/exo just by the number of products vs. reactants?

Jonny Schindler 1A

You just have to add the coefficients to the values in the ice table and the rest is exactly the same

Jonny Schindler 1A

Consider which side of the reaction equation has heat energy. If heat energy is a reactant, an increase would result in a shift towards the products and vice verse. Essentially treat energy as a part of the reaction and use le chatlier's.

Jonny Schindler 1A

Since we will be using the partial pressures of gasses to find the equilibrium constant of some reactions, we may be asked to calculate partial pressures from a total pressure. This only requires addition and subtraction because the partial pressures of gasses in a system will add up to the total pr...

Jonny Schindler 1A

The equation for the ideal gas law can be modified to correct for characteristics of a specific gas. It can incorporate the attraction between gas molecules as well as the volume of the gas molecules.

Jonny Schindler 1A

Both K and Q represent the ratio of products to reactants, but using Q implies that the reaction is not at equilibrium and the ratio will shift until equilibrium is reached. At this point, the ratio is represented as K

CHEMISTRY COMMUNITY

Search found 30 matches

Re: Reaction Mechanisms

Re: Catalysts in Rate Law

Re: K constants

Re: Kinetics

Re: difference between chemical reaction and reaction mechanism?

Reaction order

Re: the phases in a cell diagram

Re: E cell spontaneity

Re: Order of Cell Diagrams

Re: K

Re: Delta G rules

Re: Melting of ice

Re: Boltzmann Equation

Re: Derivations

Re: S value

Re: ln(k2/k1)=(-delta H/R)(1/T2 - 1/T1)

Re: Redox Reactions

Re: Delta S Fusion

Re: Calculating entropy

Re: Negative Temperature

Re: delta S

Re: Steam

3rd method

Re: Different enthalpy calculation methods

Re: endo/exothermic rxns

Re: Stoichiometric Coefficients

Re: Temperature's effect on Kc

Re: use

Re: Ideal vs Real Gas

Re: Reaction Quotient