Question

Two substances have different ΔHvaporization values. If given the same number of moles of each substance, and assuming the same amount of heat is applied to both substances, the substance with a higher ΔHvaporization value will convert from a liquid to a gas more quickly.
True
False

Answer 1

OMG i forgot wat delta H symbolise do u knw??

Answer 2

I think temperature change?

Answer 3

no its not reagarding to temp change wait i m cross checking it ok @Ishaan94

Answer 4

Its enthalpy

Answer 5

i got it :o how to do this qn :P
listen here u are saying both are given same heat and here delta H is of vapourisation means it exothermic process
mean more delta H in exothermic mean more stability of products ans yes it ll convert into gaes v.quickly. so the ans is true :)

Answer 6

False. delta H of vap is the Heat absorbed per mole.

Answer 7

H is Enthalpy..defined as total heat content of the system

Answer 8

delta H vapourisation is exothermic or endothermic ?? @ASD28803

Answer 9

If the sign is (-) then exo If the sign is (+) then endothermic

Answer 10

i knw i m asking heat of vapoursation is exo or endo process??

Answer 11

hey i chcked and heat of vapourisation i exothermic process so the ans of this qn is true

Answer 12

vaporisation is ---> endothermic.

Answer 13

ok then answer is false :P if the process is endothermic :)

Answer 14

when you put some spirit on your palm, your palm feels cool - because the spirit *absorbs* heat - the molecules utilise that heat to gain kinetic energy and evaporate! So, as the the liquid vaporises, your palm feels cooler.

In short, it's endothermic because the molecules of the the liquid need energy to escape the liquid phase - which they get by absorbing heat.

Answer 15

yea i thought it is exo as u knw when we boil water wat happen all the heat is released and heat released mean exo

Answer 16

so i was lil bit confused now confirm its endo thnQ for coming @apoorvk :)

Answer 17

heat is released?? heat is not released exactly - it's not heat. it 'feels' hot because it's at a higher temperature - but eventually, it's the same thing. The molecules of water absorb that heat from the burner, gain KE, and whooshh!!! - convert into steam!

Answer 18

okhay whosssshhh !!! lol bhai ok now i got it :)

Answer 19

No worries ;)