Cliffs AP Chemistry, 3rd Edition

Answer: C

First, the ice must be heated to its melting point, 0.0°C.

(mass) ×(specific heat capacity) ×(∆t)

: C

...
.

(^1) g
10 0 0 500
1
10 0
50 0
g ice cal C
##% = cal
%
Next, the ice must be melted.
(mass) ×(∆Hfus)

..
1 g

10 0 76 4

764

g ice cal

# = cal

Next, the water must be heated to its boiling point, 100.0°C.

gC:

..
.
C
1

10 0 100

1 100 10

g water cal

###% =^3 cal

100 0.%

Next, the water must be vaporized.

. g water
g

cal cal

1

10 0 539

# = 5390

Next, the steam must be heated to 150.0°C

gC:

.. .C
1

10 0 0 482

1

50 0

241

g stream cal

##% = cal

%

The last step is to add up all quantities of heat required.

50.0 cal + 764 cal + 1000 cal + 5390 cal + 241 cal = 7445 calories

8. Given these two standard enthalpies of formation:

Reaction (1) SO SO^sg gh+ (^22) iiE ∆H°= −295 kJ/mole
Reaction (2) SOSO^sggh+ 32 / 2 iiE 3 ∆H°= −395 kJ/mole
What is the reaction heat for 22 SO 22 ___ggiii+O E SO 3 gunder the same conditions?
A. −1380 kJ/mole
B. −690. kJ/mole
C. −295 kJ/mole
D. −200. kJ/mole
E. −100. kJ/mole
Part II: Specific Topics