Posted by **Taasha** on Friday, August 10, 2007 at 9:30pm.

I have a couple questions:

1. When analyzing which has greater entropy, do you look at the larger number or the smaller number?

2. What two things must be met for a reaction to be spontaneous under ALL temperature conditions?

3. If heat is in the products, the equation is exothermic right? If heat is in the reactants, the equation is endothermic?

I don't understand question #1.

#2. delta G = delta H - T*delta S

so if delta H is negative and delta S is positive, delta G MUST be negative and the reaction will be spontaneous at all temperatures.

#3. right.

Thanks!

For number 1, for example, if Br2 (l) has a delta S of 152.5 and Br2 (g) has a delta S of 245.4, which one has the greater entropy? Br2 (g) because the number is larger?

Is the delta S of NaCl (aq) included in your table? I was looking for it and I couldn't find it anywhere!

S

^{o} at 298.15 (solid) NaCl is 72.38 J/mol*K. Note S is in J while delta G and delta H are in kJ/mol.

I am so sorry, and maybe it is because it is so late, but I'm not understanding anything you previously said. First of all, did you answer the question: For number 1, for example, if Br2 (l) has a delta S of 152.5 and Br2 (g) has a delta S of 245.4, which one has the greater entropy? Br2 (g) because the number is larger? Maybe I just need to stop and look at this stuff tomorrow :)

Secondly, is delta S of NaCl (aq) 298.15? What is 72.38 J/mol*K?

Once again, I am really sorry

You posted no questions about Br2 gas or liquid so I haven't answered anything about that. Second, the 298.15 Kelvin is the TEMPERATURE at which I gave you S

^{o} of 72.38 J/mol*K for NaCl (solid). Aqueous NaCl is 115.5 J/mol*K at 298.15 Kelvin

## Answer this Question

## Related Questions

- Algebra - One number is 6 more than another. If the sum of the smaller number ...
- advance algebra - The sum of two numbers is 103, the larger number is 1 more ...
- math - two numbers have a sum of 600,if the smaller number is divided into the ...
- chemistry - What is the standard entropy of reaction, the standard entropy of ...
- Math - What is my number? clue 1. my number is a multiple of 2 and 7 clue 2. My ...
- algebra 1 help - One number is 6 more than another. If the sum of the smaller ...
- Math - Can someone please help me write this statement out in formula form. ...
- statistics - SOLVE a smaller number and a larger number add up to 9 and have a ...
- math - One number is 12 more than another. The sum of the smaller number and ...
- algebra - Solve by setting up the proper equation to describe the facts given ...