Which of the following salts shall cause more cooling when one mole of the salt is dissolved in the — Thermodynamics and Thermochemistry Chemistry Question
Question
Which of the following salts shall cause more cooling when one mole of the salt is dissolved in the same amount of water? (Integral heat of solution at 298 K is given for each solute.)
Answer: A
💡 Solution & Explanation
Cooling is caused by endothermic dissolution (δ H_sol positive). The larger the positive δ H_sol, the more heat is absorbed from water, causing a larger temperature drop. $KNO_3$ (+35.4 kJ/mol) absorbs the most heat, causing maximum cooling.
💬Ask on WhatsApp →
Still have doubts about this question?
Send it to our AI chemistry tutor on WhatsApp — gets answered in minutes