Sustainable Energy
2nd Edition
ISBN: 9781337551663
Author: DUNLAP, Richard A.
Publisher: Cengage,
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Chapter 4, Problem 17P
To determine
Find the total mass of
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Q3: B:
A 208 g of C6H6 (78 g/mol.) burns in air according to the equation:
CHs + O2 - CO2 +H2O
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The Bunsen burner in your labs are fueled by natural gas, which is mostly methane, CH4. The
thermochemical equations for the combustion of methane (burning in oxygen) is:
CH4(g) + 2 O2(g) ➔ CO2(g) + 2 H2O (g) ΔH = – 890.3 kJ/mole
Calculate ΔH in kJ when 5.00 g CH4 react with an excess oxygen.
The enthalpy of combustion of benzoic acid (C6 H5 COOH) is commonly used as the standard for calibrating constant-volume bomb calorimeters; its value has been accurately determined to be −3226.7 kJ/mol. When 1.9862 g of benzoic acid are burned in a calorimeter, the temperature rises from 21.84°C to 25.67°C. What is the heat capacity of the bomb? (Assume that the quantity of water surrounding the bomb is exactly 2000 g.)
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- Determine the mass of carbon tetrachloride that should be mixed with 80 kg of glycerin so that the combined mixture has a density of 1450 kg/m3.arrow_forwardCellulose is to be burned in a waste to energy facility. The chemical equation for cellulose is C6H10O5. The atomic weights of C, H, and O are 12, 1, and 16, respectively. The ideal equation for the combustion of cellulose is C6H10O5 +6O2à6CO2 + 5H2O. Calculate the stoichiometric oxygen necessary for the combustion of cellulose. Calculate the stoichiometric air supply. The air is 23.15% oxygen by weight. If the facility operates at 1.5 tons/hour at 100% excess air. How much air is required?arrow_forwardAn average American consumes approximately 105 kJ of energy per day. The average life expectancy of an American is 77.9 years. How much coal would need to be burned to provide enough energy to meet a person's energy demands if the efficiency of energy production from coal is 38%? ☐g coalarrow_forward
- The principal component of LPG is butane, C4H10 (g). If combustion of 1 mole ofbutane produces 126 kJ of heat, how much heat can be generated by completecombustion of one 11.0 kg gas tank?arrow_forwardWrite down the chemical formulae for the combustion of the alkanes in Table 3.2 with n = 2 to n = 8. Determine the mass of CO2 produced per megajoule of energy.arrow_forwardIf hydrogen followed an ideal gas law at all pressures, calculate the pressure at which the density of CHG would exceed that of LH2 (71 kg/m3).arrow_forward
- The ideal equation for the combustion of cellulose is C6H10O5 + 6O26O2 + 5H2O. What is a similar idealized equation for pyrolysis? What end products might you expect?arrow_forwardMethanol (CH3OH) can be degraded as shown in the reaction below. Answer the following questions if methanol is present in a water at a concentration of 260 mg/L and the water flowrate is 1.7 million gallons per day (mgd). 2. CH3OH + 1.5 O2 → CO2 + 2 HLO What amount of carbon dioxide (CO2) will be produced each day (in lbs and kg)? How much oxygen (O2) will need to be supplied to degrade the methanol (in mg/L and lbs/day) if the oxygen transfer process is 48% efficient? а. b.arrow_forwardQuestion 4 2.5 pts Nitrogen gas can be combined with oxygen to form nitric oxide (NO) as shown in the following chemical reaction: N2 (g) + O2 (g) 2 NO (g) When the reaction is in equilibrium, the concentration of N2, O2 and NO are 280 g/L, 640 g/L, and 750 g/L, respectively. If the concentration of oxygen gas dropped to half, calculate the concentration of nitric oxide (NO) in g/L when the system returns to equilibrium. (N=14, O=16 g/mol) Enter your final answer with 2 decimal places.arrow_forward
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