chap 9 HW 1

Question 1

Answer 1

note:
. you do q divided by n
.the coefficient 2 next to the limiting reactant is important as we multiply the (q/n) by 2
.the + sign next to the answer to show it’s endothermic

Question 2

what happens in Enthalpy of reaction equation was written for 1 mole

Answer 2

Question 3

what is the enthalpy change of an element

Answer 3

0 because no reaction is taking place

Question 4

Answer 4

.enthalpy type given
.working out how much one mole releases and multiplying by how many moles given in 1000dm^3
.enthalpy = energy released

Question 5

if energy is released what sign do you put on the value

Answer 5

negative as it would be exothermic

Question 6

what would be activation energy of reverse reaction ( original exothermic)

Answer 6

activation energy + enthalpy change

Question 7

what will the enthalpy of a strong acid and a strong base always be

Answer 7

-57

Question 8

q/n =

Answer 8

delta h

Question 9

state and explain one way they could modify the procedure to obtain more accurate results

Answer 9

using a bomb calorimeter to reduce heat loss

Question 10

what should you never forget with your value

Answer 10

sign

Question 11

what should you look out for in question

Answer 11

.explain
.sf
.units
.why
.state symbols
.slight boldness in the letters

Question 12

when explaining concerns what do you forget

Answer 12

quote part of the definition of delta H that’s being broken by statement

Question 13

energy is lost ——-

Answer 13

to surroundings