Dr Collins chem packet Test 2 questions

[Malik35]

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Hey guys, for question number 9 on Dr Collin's Chem test # 2, what is the formula in order to derive the answer.

For # 17 , Chem test 2, Dr Collins says the answer is "obvious", it isn't quite so obvious for me (lol), I was wondering if you guys can explain to me how to derive that as well.

 

[iBeast]

Since the reaction coordinate is shifting to the products, it's transition state - reactants.

7-12 = -5

But activation energy is always positive.

 

[iBeast]

Lol didn't see your other question...

moles/x = 500 ml of solution.

Solve for x. Make sure it is in liters.

 

[Solar de riokos]

Hey guys, for question number 9 on Dr Collin's Chem test # 2, what is the formula in order to derive the answer.

For # 17 , Chem test 2, Dr Collins says the answer is "obvious", it isn't quite so obvious for me (lol), I was wondering if you guys can explain to me how to derive that as well.

For #9: activation energy = transition state - reactants = -7 - (-12) = -7 + 12 = 5 kJ
For #17: concentration = mol / volume (in Liter) = 0.002 mol/0.5 L = 0.004 M.

 

[Malik35]

Thanks dude!!

 

[Malik35]

Thanks !