CHEMISTRY COMMUNITY

Trixie Le 3K

Sorry, I meant to say reversible process, not irreversible system. Moreover, can there be an enthalpy change in a bomb calorimeter since a bomb calorimeter only implies that the system will be at a constant volume?

Trixie Le 3K

Since enthalpy is the exchange of heat at a constant pressure, is it possible for there to be an enthalpy change in an irreversible system since the pressure is constantly being adjusted slowly?

Trixie Le 3K

When you have a double carbon bond, there are usually two ways in which it can be shaped. So you look at the two carbons and the two groups attached to the carbons. Compare the two groups that are attached to the carbons. You must compare the one carbon and determine which attached group is heavier ...

Trixie Le 3K

it is but- because it has four carbons total, i think when naming it a common name such as iso, sec, and tert, you count the number of carbons overall of that certain structure. 2 methyl propane is also a valid name as well, and thats just naming it by the IUPAC way rather than the common way

Trixie Le 3K

For this one the net rate of formation of O atoms is 0 because you know that this is the intermediate, which is formed and then decomposed, meaning that in the overall reaction there is no O in it. That is why O= k1[O3] - k1'[O2][O] - k2[O][O3}=0 because there is no O in the overall reaction. Then f...

Trixie Le 3K

For this problem it asks what happens after the concentration increases to 0.018 M B, and since the reaction is A --> 3B + C, and you're doing everything by the reactant A since initial reactant A is 0.015M. What that means is how much of reactant A has reacted with reactant B so since there are 3 m...

Trixie Le 3K

Gibbs free energy is something that combines the component of entropy and enthalpy to tell whether a reaction is likely to naturally happen in nature, or whether it needs an outside source of energy to happen. The change in Gibbs free energy is defined as the deltaH - T(delta)S which combines both t...

Trixie Le 3K

No, not necessarily. q = -w when it is an isothermal reversible process because the change in internal energy of an isothermal reversible process is 0 and (change in internal energy) = q +w and if q + w =0 then therefore you can transform the equation into q=-w because the temperature and internal e...

Trixie Le 3K

The water is heated up to 100 C because that is the boiling point of water where water turns from liquid to gas. There is a change because the question asks for the standard enthalpy of vaporization of water at 85 C, which implies that it was a liquid that was heated up to 100C (accompanied by entro...

Trixie Le 3K

Benzene requires a different value because of the resonance of benzene. Since benzene has multiple trigonal planars that can form both pi bonds and omega bonds, those bonds overlap and then it becomes almost a cylinder shape and it becomes planar. Moreover, the resonance of benzene is the average of...

Trixie Le 3K

Heat is the energy transferred as a result of a temperature difference and occurs when an object or system is in contact with something of a different temperature. When one object has more thermal energy interacts with a different object with less thermal energy, the molecules of the object with hig...

Trixie Le 3K

We are actually just adding up all the enthalpies of the equation, and in some cases some enthalpy values may be negative or positive depending upon whether it is an endothermic or exothermic reaction happening with that bond. In this case, breaking bonds is often endothermic, meaning that the value...

Trixie Le 3K

Here is the .mov version.

Trixie Le 3K

I know that increasing intensity does not matter regarding the photoelectric effect and if it did, then it would act like a wave in that sense. How would it act like a wave if intensity did affect the capability of the photons to eject electrons?

CHEMISTRY COMMUNITY

Search found 14 matches

Re: Enthalpy and Work

Enthalpy and Work

Re: Cis and Trans

Re: Common Names

Re: Pre-Equilibrium and Elementary Reactions

Re: textbook number 15.29??

Re: Gibbs Free energy in a nutshell?

Re: q and w in a reversible process

Re: Homework 9.19

Re: bond enthalpy

Re: Heat vs Work

Re: Understanding Bond Enthalpies

Re: Video: Le Chatelier's Principle and Equilibrium Calculat

Intensity with photoelectric effect