For a substance to melt it has to be a solid
<span>Increasing the surface area helps dissolve more flavoring</span>
Answer:reaction 2,5,6
Explanation:
First, we need to define what the enthalpy of formation is and what the enthalpy of reaction is____
<u>Formation Enthalpy</u>: It is the variation of the calorific energy in the reaction of ONE MOL of a compound starting from the elements.
<u>Reaction Enthalpy: </u>It s the variation of the calorific energy in the reaction of reactives, in this cases could be any quantity of mol
Then: We have six reactions:
1)CaCO3(g)→ CaO+ CO2(g)
2)Li(s)+12F2(g)→LiF(s)
3)CO(g)+12 O2(g)→ CO2(g)
4)2Li(s)+F2(g)→2LiF(s)
5)Li(s)+12F2(l)→LiF(s)
6)C(s,graphite)+ O2(g)→ CO2(g)
The enthalpy of reaction will be equal to reaction enthalpy when we produce one mol from elements
The answer is the reactions 2,5,6
Answer:
In experiment after experiment, they're always right
Explanation:
In science, nothing is accepted unless it can be supported by empirical evidence, this includes the quantum laws.
A plethora of experiments have confirmed these quantum laws to be correct and reliable.
Hence, all the quantum laws are backed up by plenty scientific evidence that show that the laws are indeed correct.
Answer:
Oxygen is denser
Explanation:
Oxygen is denser than both air and nitrogen, at all temperatures and pressures, but only slightly. Since they don't separate from each other, we generally don't worry which is lighter or heavier. The difference in the density of nitrogen and oxygen gas comes from their molecular weight, which is small (4 g/mol)