Sustainable Energy
2nd Edition
ISBN: 9781337551663
Author: DUNLAP, Richard A.
Publisher: Cengage,
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Chapter 6, Problem 11P
To determine
Compare the chemical energy content of the coal with the available fission energy and the total available fission energy from the uranium.
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The change in internal energy for the combustion of 1.0 mol of octane at a pressure of 1.0 atm is -5084.3 kJ .
If the change in enthalpy is -5074.0 kJ , how much work is done during the combustion?
Express the work in kilojoules to three significant figures.
Environmental Engineering
When methanol is used to generate hydrogen, it reacts with the following reaction:
CH3OH>>>>CO+2H2
The reaction is second order in methanol, and it is observed that 100g of carbon monoxide can be produced in one day in a batch reactor, if you start with 200g of methanol. What is the rate constant for this reaction?
When methanol is used to generate hydrogen, it reacts with the following reaction:
CH3OH => CO + 2 H2
The reaction is second order with regards to methanol (CH3OH) and it is observed that 100 g/L of carbon monoxide (CO) can be produced in one day in a batch reactor, if you start with 200 g/L of methanol. What is the rate constant of this reaction (don’t forget to include units)?
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- Write 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_forwardFor the solidification of iron, calculate the critical radius r* and the activation free energy ΔG* if nucleation is homogeneous. Values for the latent heat of fusion and surface free energy are –1.85 × 109 J/m3 and 0.204 J/m2, respectively. Use the supercooling value ΔT = 291 K, and the melting point of iron is 1538°C. Calculate the number of atoms found in a nucleus of critical size. Assume a lattice parameter of 0.292 nm for solid iron at its melting temperature.arrow_forward(a) What is the physical significance of energy of activation ? Explain with diagram.(b) In general, it is observed that the rate of a chemical reaction doubles with every 10 degree rise in temperature. If the generalization holds good for the reaction in the temperature range of 295 K to 305 K, what would be the value of activation energy for this reaction ?[R = 8.314 J mol-1 K-1]arrow_forward
- 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.)arrow_forwardAn insulated Thermos contains 110 cm3 of hot coffee at 83.0°C. You put in a 15.0 g ice cube at its melting point to cool the coffee. By how many degrees has your coffee cooled once the ice has melted and equilibrium is reached? Treat the coffee as though it were pure water and neglect energy exchanges with the environment. The specific heat of water is 4186 J/kg-K. The latent heat of fusion is 333 kJ/kg. The density of water is 1.00 g/cm³. Number i 52.42 Units C°arrow_forwardWhat particle is produced during the following decay processes: (a) sodium-24 decays to magnesium-24; (b) mercury-188 decays to gold-188; (c) iodine-122 decays to xenon-122; (d) plutonium-242 decays to uranium-238?arrow_forward
- When Ethanol is burn in the presence of Oxygen. Carbon Dioxide (CO2) and water (H2O) molecules are produced. The unbalance reaction of Ethanol and oxygen is given as C2 H5OH + O2→ CO2 +H2O How many grams of Oxygen is required to completely burn 920 grams of Ethanol? Atomic weight: C =12: H = 1: 0 = 16arrow_forwardFind the theoretical oxygen demand of 140 g of benzene (C6H6) in g of O2 Your Answer: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_forward
- Cellulose is to be burned in a waste-to- energy fadlity. The chemical equation for cellulose C6 H10O5is the atomic weights of C, H, and O are 12, 1, and 16. respectively. a. Calculate the stoichiometric oxygen necessary for the combustion of cellulose. b. Calculate stoichiometric air.arrow_forward1.Consider the following reaction: CH4 + 2O2 --> 2H2O + CO2 How many moles of water can be formed from 2.4 moles of CH4? 2. Consider the following reaction: 2H 2 + O 2 --> 2H 2O How many moles of water can be formed from 7 mole of H2 and 2.4 moles of O2? 3. How many grams of Fe are produced from 33.2 g of FeO given the following reaction: 3FeO + 2Al --> 3Fe + Al2O3 Be sure to use correct significant figures and units in the answer. 4. For the reaction whose balanced equation is as follows, find how many grams of zinc phosphate will be produced by the reaction of 7.625 grams of zinc chloride. 3 ZnCl2 + 2 (NH4)3PO4 → Zn3(PO4)2 + 6 NH4Cl Be sure to use correct significant figures and units in the answer.arrow_forwardCurrent Attempt in Progress What mass of steam at 100°C must be mixed with 344 g of ice at its melting point, in a thermally insulated container, to produce liquid water at 28.0°C? The specific heat of water is 4186 J/kg-K. The latent heat of fusion is 333 kJ/kg, and the latent heat of vaporization is 2256 kJ/kg. Number i Units eTextbook and Mediaarrow_forward
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