The answer would be icebergs
Hope this helps :)
Number 18 is correct, number 19 is the particles speed up and the substance expands, and number 20 is decrease in volume
<span>Ans : When looking at the second equation, we see it is double the first reaction and in the opposite direction.
First, change the direction of the first equation. When the direction of the reaction is changed, the sign on ΔH changes for the reaction
H​2O2(l) → H2O(l) + 1/2 O2(g); ΔH = -98.2 kJ
becomes
H2O(l) + 1/2 O2(g) → H2O2(l); ΔH = +98.2 kJ
Second, multiply this reaction by 2. When multiplying a reaction by a constant, the ΔH is multiplied by the same constant.
2 H2O(l) + O2(g) → 2 H2O2(l); ΔH = +196.4 kJ
ANSWER:
ΔH = +196.4 kJ for the reaction: 2 H2O(l) + O2(g) → 2 H2O2(l)</span>
The final temperature of the water will be 31.2 C.
