CHEMISTRY COMMUNITY

AshleyAguilar_1F

why would there be more molecules in the gauche conformation at higher temperatures?

AshleyAguilar_1F

In this question it asks to complete the reaction mechanism, and in the answer the Iodine is on the left carbon and the Hydrogen is on the right carbon, but can it be the other way around? (hydrogen on left carbon, iodine on right carbon)

AshleyAguilar_1F

At this point are we supposed to be able to give an example of an Organolithium compound? or an alkyl Grignard reactant? and give examples of alkenes and alkynes? It asks these kinds of questions throughout the section but there isn't very much information about them in the text

AshleyAguilar_1F

It asks to write balanced equations before calculating enthalpy, entropy, and gibbs free energy. Does the equation need to have the smallest possible molar ratios? I balanced the equation as 3H2 (g) + N2 (g) --> 2NH3 (g) and I got a different answer for entropy than the solutions manual

AshleyAguilar_1F

So for the right side of the cell diagram the half-reaction should be O2 (g) + 2H2O (l) + 4e- --> 4OH - (aq) . **originally just O2 (g) --> OH- (aq)** I don't understand why the water molecules are on the reactants side if the first step to balancing the equation is to balance the oxygen molecules (...

AshleyAguilar_1F

thanks!

AshleyAguilar_1F

the skeletal equation is: Cl2 (g) + S2O3 2- (aq) --> Cl- (aq) + SO4 2- Chorine gas is gaining just 1 electron... okay so in the solutions manual the reduction half-reaction is Cl2 (g) + 2e- --> 2Cl- (aq) and I do not understand why we add 2 electrons; that would make the left side have a charge of 2...

AshleyAguilar_1F

"Assuming that the heat capacity of a ideal gas is independent of temperature, calculate the entropy change associated with raising the temp 1.00 mol of ideal gas atoms.... "

How do we know that this is a monatomic gas?

AshleyAguilar_1F

The units given for delta H of the reaction is given as 358.8 kJ (not per mole), but the solutions manual gives the enthalpy in kJ/mol and so delta H is multiplied by the 1.25 mols of Sulfur in order to cancel the units. Why did they just change the units? Anyways I thought kJ/mol was used for phase...

AshleyAguilar_1F

Graphite is solid, but we need it to be in the form of a gas. Sublimation is Hvapor - Hsolid, and the problem said the sublimation of carbon is +717 kJ*mol, so 717- 0 (enthalpy of carbon in it's most stable form graphite is 0) = +717kJ*mol^-1.

AshleyAguilar_1F

I thought that the formation of methanol was CO + 2H2. While it makes sense to me why it is actually set up C (gr) + 2H2 (g) + 1/2O2, I don't understand how we are supposed to know that this is the way it's done for this particular problem. CO is bonded by a triple bond, which is a mean bond enthalp...

AshleyAguilar_1F

When writing out the balanced equations for the reaction given do we need to use the most simplified (in terms of the moles) equation? For example, for the combustion of H2 I have it written as 2H2 + O2 --> 2H2O but the solutions manual has it more simplified (H2 + 1/2O2 --> H2O), and so the answers...

CHEMISTRY COMMUNITY

Search found 12 matches

self test 3.3A

4.26 ochem textbook

4.11, 4.13

9.55

14.11 d)

Re: 14.3

14.3

9.7

Question 8.45

Re: HW 8.67

HW 8.67 b) [ENDORSED]

Problem 8.57 (Hess's Law)