Question

How much energy is needed to evaporate 5 grams of water?

Answer 1

Explanation:
For the reaction.......
H
2
O
(
l
)
+
Δ
→
H
2
O
(
g
)
WHERE BOTH PRODUCT AND REACTANT ARE AT
100

∘
C
,
..........
Δ
H
∘
vaporization
=
40.66
⋅
k
J
⋅
m
o
l
−
1
And thus we need to assess the molar quantity of the water vaporized......
Δ
H
rxn
=
5.00
⋅
g
18.01
⋅
g
⋅
m
o
l
−
1
×
40.66
⋅
k
J
⋅
m
o
l
−
1
=11.3 kJ

Answer 2

Answer:

It's 11.3. kj

Explanation:

For the reaction.......

H

2

O

(

l

)

+

Δ

→

H

2

O

(

g

)

WHERE BOTH PRODUCT AND REACTANT ARE AT

100

∘

C

,

..........

Δ

H

∘

vaporization

=

40.66

⋅

k

J

⋅

m

o

l

−

1

And thus we need to assess the molar quantity of the water vaporized......

Δ

H

rxn

=

5.00

⋅

g

18.01

⋅

g

⋅

m

o

l

−

1

×

40.66

⋅

k

J

⋅

m

o

l

−

1

=

11.3

⋅

k

J