Question

PLEASE HELP!!!!!!!!!

Identify each enthalpy change by name and classify each change as exothermic or endothermic.

1. 1 mol NaCl (s) à 1 mol NaCl(l)
2. C4H10 O(l) à C4H10O (g)
3. H2O(g) à H2O (l)
4. 1 mol NaCl(s) + 3.88 kJ/molà 1 mol NaCl(aq)

A Molar heat of solution; endothermic
B Molar heat of vaporization; endothermic
C Molar heat of fusion; endothermic
D Molar heat of condensation; exothermic

Answer 1

Just look at the changes in state of matter

1. solid to liquid
2. liquid to gas
3. gas to liquid
4. liquid to dissolved in solution


Be sure you're familiar with the definitions of the terms at the bottom.

Answer 2

im not i've tried everything, can you just give me the answer plzz?!?!

Answer 3

what does "Molar heat of vaporization" mean?

Answer 4

the amount of heat required to vaporize 1 mol of a liquid to a gas

Answer 5

so look at the options..

2. liquid to gas

Answer 6

WOW!! im so stupid

Answer 7

nah, you just don't know. it's hard to get started. good luck !

Answer 8

Thank You

Answer 9

no problem