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anonymous
 one year ago
1.) To calculate the enthalpy of the reaction, H2 (g) + Cl2 (g) → 2HCl (g), you need to subtract which heats of formation?
a. HCl (g) and H2 (g)
b. HCl (g)
c. H2 (g) and Cl2 (g)
d. none of them
2.) When calculating the enthalpy of a reaction, if the reactant has a coefficient of 2, what must be done to the ΔHf value of the reactant?
a. Divide by 2
b. Multiply by 2
c. Add 2
d. Subtract 2
3.) If the reaction is reversed during a Hess’s law calculation, what must be done to the ΔH for that reaction?
a. It must be left alone
b. It must be multiplied by 1
c. The sign must change
d. the sign must not change
anonymous
 one year ago
1.) To calculate the enthalpy of the reaction, H2 (g) + Cl2 (g) → 2HCl (g), you need to subtract which heats of formation? a. HCl (g) and H2 (g) b. HCl (g) c. H2 (g) and Cl2 (g) d. none of them 2.) When calculating the enthalpy of a reaction, if the reactant has a coefficient of 2, what must be done to the ΔHf value of the reactant? a. Divide by 2 b. Multiply by 2 c. Add 2 d. Subtract 2 3.) If the reaction is reversed during a Hess’s law calculation, what must be done to the ΔH for that reaction? a. It must be left alone b. It must be multiplied by 1 c. The sign must change d. the sign must not change

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taramgrant0543664
 one year ago
Best ResponseYou've already chosen the best response.0Any guesses?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@taramgrant0543664 not at all lol im taking a class with JUST tests and quizzes and no lessons or anything

taramgrant0543664
 one year ago
Best ResponseYou've already chosen the best response.0Ok well delta Hf is found by products minus reactants

taramgrant0543664
 one year ago
Best ResponseYou've already chosen the best response.0So for number 1 there you are looking for the reactants

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@taramgrant0543664 so would it be B. HCl (g)?

taramgrant0543664
 one year ago
Best ResponseYou've already chosen the best response.0HCl is the product of the reaction the reactants are the things that form the products

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@taramgrant0543664 oh so wait it would actually be C?

taramgrant0543664
 one year ago
Best ResponseYou've already chosen the best response.0Yes it would be

taramgrant0543664
 one year ago
Best ResponseYou've already chosen the best response.0Any guesses for the second one?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@taramgrant0543664 for the second one im guessing it would be add 2 but am not sure

taramgrant0543664
 one year ago
Best ResponseYou've already chosen the best response.0No it would not be add two. There are twice the amount of reactants so Hf should be twice the amount

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@taramgrant0543664 ohhh so multiply 2!

taramgrant0543664
 one year ago
Best ResponseYou've already chosen the best response.0Yes it would be

taramgrant0543664
 one year ago
Best ResponseYou've already chosen the best response.0For the last one since you are reversing the reaction so essentially you are flipping it any idea what it could be?

taramgrant0543664
 one year ago
Best ResponseYou've already chosen the best response.0Flipping is the key word there

taramgrant0543664
 one year ago
Best ResponseYou've already chosen the best response.0@twelveroses i have to go now but do you have an idea on what it is?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@taramgrant0543664 no i dont im trying to figure out what the formula is for hess's law calculations :/

taramgrant0543664
 one year ago
Best ResponseYou've already chosen the best response.0You don't need the formula for the question but all it is is delta Hf equals the sum of heats for the products minus the sum of heats for the reactants

taramgrant0543664
 one year ago
Best ResponseYou've already chosen the best response.0For number three if you are going in the positive direction and you reverse the reaction you're going to be going in the negative direction now. I'm sorry I have to go now though!!

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0its okay thank you!!
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