Answer:
Explanation:
a) for shifting reactions,
Kps = ph2 pco2/pcoph20
=[h2] [co2]/[co] [h2o]
h2 + co2 + h2O + co + c3H8 = 1
it implies that
H2 + 0.09 + H2O + 0.08 + 0.05 = 1
solving the system of equation yields
H2 = 0.5308,
H2O = 0.2942
B) according to Le chatelain's principle for a slightly exothermic reaction, an increase in temperature favors the reverse reaction producing less hydrogen. As a result, concentration of hydrogen in the reformation decreases with an increasing temperature.
c) to calculate the maximum hydrogen yield , both reaction must be complete
C3H8 + 3H2O ⇒ 3CO + 7H2( REFORMING)
CO + H2O ⇒ CO2 + H2 ( SHIFTING)
C3H8 + 6H2O ⇒ 3CO2 + 10 H2 ( OVER ALL)
SO,
Maximum hydrogen yield
= 10mol h2/3 molco2 + 10molh2
= 0.77
⇒ 77%
Answer: It will be saved $81 per year.
Explanation: A <u>car without the tires</u>, that gets 35mpg and is driven 15,000 miles per year, will have a fuel cost of:
1 gal ---- 35 miles
x gal ---- 15,000 miles
x =
x = 428.57 gal
Per year, 1 gal costs $3.5, then:
cost = 428.57*3.5
cost = 1500
<u>The car with the tires</u>, improve the efficiency in nearly 2mpg, i.e.:
efficiency = 35 + 2 = 37mpg
1 gal ----- 37 miles
y gal ----- 15,000 miles
y =
y = 405.40 gal
Per year:
cost = 405.40*3.5
cost = 1419
The difference in costs is:
d = 1500 - 1419
d = 81
With lowest rolling resistance tires, a car will save, per year, $81.
Answer:
The Border Patrol of the United States analyzes the purchase of a new helicopter for the aerial surveillance of the border of New Mexico and Texas with the Mexican Republic. 4 years ago a similar helicopter was purchased at a cost of $ 140,000.00. with an interest rate of 7% per year. Calculate the single payment factor and the present value factor with the above data with the table and formula. Draw the flow chart.
Explanation: