Answer:
That we know about yes, but physicians still say there are more things out there. (we do not know about these yet tho)
Explanation:
Because it requires lots of electricity to turn it into an aqueous solution so that electrolysis can be performed on it.
Answer:
–500KJ
Explanation:
Data obtained from the question include the following:
Heat of reactant (Hr) = 800KJ
Heat of product (Hp) = 300KJ
Enthalphy change (ΔH) =..?
The enthalphy change is simply defined as the difference between the heat of product and the heat of reactant i.e
Enthalphy change = Heat of product – Heat of reactant
ΔH = Hp – Hr
With the above formula, we can easily calculate the enthalphy change as follow
ΔH = Hp – Hr
ΔH = 300 – 800
ΔH = –500KJ.
Therefore, the overall energy change for the reaction between hydrogen and oxygen shown in the diagram above is –500KJ
1) D. An element
2) D. Suspension
3) A. Iodine
4) A. Atoms of the same element