1. The H for dissolving 1 mol of KOH in water is negative. What happens when you
ID: 694853 • Letter: 1
Question
1. The H for dissolving 1 mol of KOH in water is negative. What happens when you dissolve KOH in water? Select all the correct answers from the list below:
a. The temperature of the resulting solution will be higher than the initial temperature of the water.
b. The temperature of the resulting solution will be lower than the initial temperature of the water.
c. The temperature of the resulting solution is proportional to the mass of KOH you dissolve.
d. The temperature of the resulting solution does not depend on the mass of KOH you dissolve
2. True or False; More heat is needed to melt 1 mole of ice than to vaporize 1 mole of liquid water.
3. True or False; More heat is needed to heat 1 mole of liquid water from 0°C to 10°C than to heat 1 mole of ice from -10°C to 0°C.
Explanation / Answer
1)
since delta H is negative, reaction will release heat
this will be absorbed by solution
So, temperature of solution will increase
This temperature will depend on both mass of water and KOH
Answer: a
2)
delta H fusion is less than delta H of vapourisation
So, more heat is needed to vapourize
Answer: False
I am allowed to answer only 1 question at a time
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.