100 POINTS How many kilojoules of heat are required to vaporize 30.0 grams of ethanol (C, H,OH) if the boiling point of ethanol is 78.5C?
C, H,OH + 30, +43.5 kJ → 2 CO2 + 3 H20

H

3

CCH

2

OH(

l

)

+

Δ

→

H

3

CCH

2

OH

(

g

)

You have a mass of

50.0

⋅

g

EtOH

, that is assumed to be at

78.3

∘

C

, and the enthalpy of vaporization is calculated by the product:

Δ

H

∘

vaporization

=

50.0

⋅

g

46.07

⋅

g

⋅

m

o

l

−

1

×

38.6

⋅

k

J

⋅

m

o

l

−

1

=

=

?

?

⋅

k

J

.

each  column  of the  table  is called a group. elements in a group share similar properties. groups are  read  from  top  to  bottom. metal. metalloid. nonmetal. solid. liquid. gas. fe. hg. o.  2. 3. 4. 5. 6. 7. 8. 9.  2. beryllium. 9.012. 4.  sodium. 22.990.  11. 3.  magnesium. 24.305.  12.  potassium. 39.098.  19. 4.  calcium. 40.078.  20. i guess  i  

your answer would be “dry”