Air is 21.0% by volume oxygen molecules and C3H8 produces CO2
and H2O on combustion. What volume of air at 1.00 bar and 20.0 °C
would be required to burn 38.8 Kg of propane (C3H8)?
a) The complete combustion of 10.0 g of solid naphthalene
requires what volume of oxygen gas at 20.0 oC and 1.00
atm? How much heat energy will be transferred in this trial?
Specify direction of heat transfer in your answer.
b) If the water vapor and carbon dioxide gas produced in the
trial described in part d. is collected in a 20.0
L container at 427 oC and this container can only
withstand a maximum of 5.00 atm of pressure,...
Calculate the volume of oxygen produced (measured at
standard temperature and pressure - STP) at the anode during
the electrolysis of sodium sulfate solution, if the electrolytic
cell is operated at a current of 2.50 amperes for 45 minutes.
F = 9.65 x 104 C mol-1 (or 96,500 C mol-1). The molar volume of
a gas at STP = 22.4 L mol-1 the two possible reactions at the anode
are;
O2(g) + 2H2O(l) + 4e-
4OH-(aq) E = 0.40V
SO42-...
Liquid air is available (79 mol% of nitrogen and 21 mol% of
oxygen) and it is required to obtain a fraction whose oxygen
content is 90% (mol), for which part of the mixture evaporates to
the atmospheric pressure. Determine the fraction of evaporated
mixture, taking as the average value of relative volatility
4.12
1) Consider the combustion of coal
(C70H41O6N) with a heat of
formation of -300kJ/mol in 20 mol% excess air with main combustion
products of CO2 , H2O, and NO2
.
a) Write the balanced form of this reaction
b) Calculate the standard heat of reaction
c) Calculate the heat of reaction at 16000 C
complete combustion of a 0.30- mol sample of hydrocarbon gives
1.20 mol of CO2 and 1.50 mol of H2O. What is the molecular formula
of the original hydrocarbon?
In a hot combustion chamber, oxygen diffuses through a stagnant
film of air with thickness L to the carbon surface where
it reacts to make CO and CO2. The mole fraction of
oxygen just outside the stagnant film (z = 0) is 0.21. The
reaction may be assumed to be instantaneous. No reaction occurs in
the gas film. The chamber is at 1 atm, 1000 K, and L = 10
cm. The diffusivity of oxygen at these conditions is 0.35...
At constant volume, the heat of combustion of a particular
compound is −3300.0 kJ/mol. When 1.327 g of this compound (molar
mass=189.80 g/mol) was burned in a bomb calorimeter, the
temperature of the calorimeter, including its contents, rose by
3.747 ∘C. What is the heat capacity (calorimeter constant) of the
calorimeter?