The answer is Didn't
the left side has 2 K and right right side is only one
I am only in 6th grade i dont know this
Answer:
∆H = -763kJ
Explanation:
Using Hess's law we can determine the ΔH of a reaction from the sum of similar reactions. Using the reactions:
<em>(1) </em>2PCl3(l) → 2P(s) + 3Cl2(g) ∆H = -640 kJ
<em>(2) </em>2P(s) + 5Cl2(g) → 2PCl5(s) ∆H = -886 kJ
The sum of (1)/2 + (2)/2 gives:
(1) / 2 = PCl3(l) → P(s) + 3/2Cl2(g) ∆H = -640 kJ/2 = -320kJ
(2) / 2 = P(s) + 5/2Cl2(g) → PCl5(s) ∆H = -886 kJ/2 = -443kJ
PCl3(l) + Cl2(g) → PCl5(s) ∆H = -320kJ - 443kJ =
<h3>∆H = -763kJ
</h3>
Answer:
Solution B,
A concentrated solution is one that has a relatively large amount of dissolved solute. A dilute solution is one that has a relatively small amount of dissolved solute. However, these terms are relative, and we need to be able to express concentration in a more exact, quantitative manner.
