Please Help! I am in desperate need Question 1
Answer the true/false questions based on the diagram above.
I have no clue where the graph is tho, my teacher did not post one.
Addition of a catalyst will change the value for ΔH
True
False

Question 2
Consider the chemical reaction equation shown.
H + H--> H-H
Is this reaction endothermic or exothermic?

a
Endothermic
b
Exothermic

Question 3

a
AB
b
BC
c
CD
d
DE

Question 4
A chemical reaction has a reaction enthalpy of −512 kJ/mol. Is it endothermic or exothermic?
a
Endothermic
b
Exothermic

Question 5
What is the energy required to evaporate two moles of liquid water given the following equations?

2H2(g) + O2(g) → 2H2O(g) ∆H = -483.6 kJ

2H2(g) + O2(g) → 2H2O(l) ∆H = -571.6 kJ

a
44.0 kJ
b
88.0 kJ
c
527.6 kJ
d
1055.2 kJ