Question 4 not yet graded 0 pts thermochemical

Question 4
Not yet graded / 0 pts
Thermochemical Equation Problems
4. Hydrosulfuric acid (H
2
S) undergoes combustion to yield sulfur dioxide and
water by the following reaction equation:
2 H
2
S + 3 O
2
→ 2 SO
2
+ 2 H
What is the ΔH of the reaction if 26.2 g of H
2
S reacts with excess O
2
to yield
431.8 kJ?
2
O
Question 5
Not yet graded / 0 pts
Measuring Heat of Reaction Problems
5. A sample of ethanol (C
2
H
5
OH), weighing 6.83 g underwent combustion in a
bomb calorimeter by the following reaction:

C
2
H
5
OH (l) + 3 O
2
(g) → 2 CO
2
(g) + 3 H
If the heat capacity of the calorimeter and contents was 18.1 kJ /
o
C and the
temperature of the calorimeter rose from 25.50 to 36.73, (1) what is the ΔH
of the reaction? Using the definitions at the beginning of the module
describe (2) the calorimeter + contents, (3) the type of process.
2
O (l)