The answer is the third one .
For most chemistry problems involving <span><span>Δ<span>H<span>of</span></span></span>
</span>, you need the following equation:
<span><span>Δ<span>H<span>o<span>reaction</span></span></span>=ΣΔ<span>H<span>of</span></span><span>(p)</span>−ΣΔ<span>H<span>of</span></span><span>(r)</span></span>
</span>,
where p = products and r = reactants.
You’d need to mix over have the mass of the 450 gram solution
The solubility of potassium chloride <u>increase</u><u>s</u><u> </u>as its temperature <u>increases</u><u>.</u>
- <em>When</em><em> </em><em>the</em><em> </em><em>temperature</em><em> </em><em>of</em><em> </em><em>water</em><em> </em><em>increases</em><em> </em><em>the</em><em> </em><em>particles</em><em> </em><em>of</em><em> </em><em>KCl</em><em> </em><em>(</em><em>Potassium</em><em> </em><em>chloride</em><em>)</em><em> </em><em>starts</em><em> </em><em>to</em><em> </em><em>move</em><em> </em><em>freely</em><em>.</em><em> </em><em>Thus</em><em>,</em><em> </em><em>Resulting</em><em> </em><em>in</em><em> </em><em>the</em><em> </em><em>increased</em><em> </em><em>solubility</em><em>.</em><em>.</em><em>.</em>
I don't know if I am correct but I am just guessing, I think that it is the suspended mass. I don't know if that is correct.