Answer:
Positive
Explanation:
For the most effective hot pack, the temperature change should be <u>positive</u>.
<em>Hot packs are generally utilized for their heat-producing abilities. Hence, the reactions leading to the activation of hot packs are usually exothermic, that is, heat energy generating. In other words, positive or increased temperatures must be generated when hot packs are activated.</em>
This is unlike cold packs which are utilized for the cold-generating abilities. Reactions leading to their activations must be endothermic, that is, heat-absorbing.
The answer for this is 26.6°c
2O3→3O2
The number of moles of O2 that are produced when 0.50 moles of O3(g) reacted is 0.75 moles
calculation and explanation
2 moles of O3(ozone) react to give 3 moles of O2 (oxygen gas,therefore the reacting ratio between O3 :O2 is 2:3
if 0.50 moles of O3 reacted then,by use of reacting ratio (2:3) find the moles of O2 produced
That is 0.50 x3/2 = 0.75 moles
The answer is Silver (Ag)
