Sustainable Energy
2nd Edition
ISBN: 9781337551663
Author: DUNLAP, Richard A.
Publisher: Cengage,
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Chapter 4, Problem 12P
(a)
To determine
Find the mass of
(b)
To determine
Determine the density of
Determine the size of the cubic container.
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A gas undergoes a cycle in a piston-cylinder assembly consisting of the following three processes:
Process 1-2: Constant pressure, p = 1.4 bar, V₁ = 0.028 m³, W12 = 10 kJ
Process 2-3: Compression with pV = constant, U3 = U₂
Process 3-1: Constant volume, U₁ - U3 = -25 kJ
There are no significant changes in kinetic or potential energy.
(a) Calculate the net work for the cycle, in kJ.
(b) Calculate the heat transfer for process 1-2, in kJ.
Part A
Your answer is correct.
Calculate the net work for the cycle, in kJ.
Wcycle = -7.63
kJ
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.
Cellulose 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?
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- 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_forwardThe 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.)arrow_forward
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