The chemical reaction representing aerobic respiration is, C,H„0,(s) + 60,(g) → 6CO,(g) + 6H,O(g) A,H =-2500 kJ mol and is the exact reverse of photosynthesis. A small child exhales about 3 moles of CO, in a 24 hour period, what amount of energy (in kJ) is associated with the conversion of 3 moles of CO, back to glucose by photosynthesis? Submit your answer with correct sign, units and significant figures! Submit response

The chemical reaction representing aerobic respiration is, C,H„0,(s) + 60,(g) → 6CO,(g) + 6H,O(g) A,H =-2500 kJ mol and is the exact reverse of photosynthesis. A small child exhales about 3 moles of CO, in a 24 hour period, what amount of energy (in kJ) is associated with the conversion of 3 moles of CO, back to glucose by photosynthesis? Submit your answer with correct sign, units and significant figures! Submit response

Chemistry & Chemical Reactivity

9th Edition

ISBN:9781133949640

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter5: Principles Of Chemical Reactivity: Energy And Chemical Reactions

Section: Chapter Questions

Problem 110SCQ: Peanuts and peanut oil are organic materials and bum in air. How many burning peanuts does it take...

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Peanuts and peanut oil are organic materials and bum in air. How many burning peanuts does it take to provide the energy to boil a cup of water (250 mL of water)? To solve this problem, we assume each peanut, with an average mass of 0.73 g, is 49% peanut oil and 21% starch; the remainder is noncombustible We further assume peanut oil is palmitic acid, C16H32O2, with an enthalpy of formation of 848.4 kJ/mol. Starch is a long chain of C6H10O5 units, each unit having an enthalpy of formation of 960 kJ.
It is estimated that the net amount of carbon dioxide fixed by photosynthesis on the landmass of earth is 5.5*1016 g/yr of CO2. Assume that all this carbon is converted into glucose. Calculate the energy stored by photosynthesis on land per year, in KJ. Calculate the average rate of conversion of solar energy into plant energy in megawatts, MW. A large nuclear power plant produces about 103 MW. The energy of how many such nuclear power plants is equivalent to the solar energy conversion?
The heat of combustion of carbon, hydrogen and sucrose are 394.82, -289.28 and -5665.8kj/mol resp. What is the enthalpy of formation of sucrose?
A sodium ion, Na+, with a charge of 1.6 * 10-19 C and a chlorideion, Cl - , with charge of -1.6 * 10-19 C, are separated bya distance of 0.50 nm. How much work would be required toincrease the separation of the two ions to an infinite distance?
We submerge a 32.5-g iron rod, initially at 22.7°C, into anunknown mass of water at 63.2°C, in an insulated container. Thefinal temperature of the mixture upon reaching thermalequilibrium is 59.5°C. What is the mass of the water?
The same student wanted to determine the heat of dissolution for potassium chlorate (KClO3, MW: 122.55 g/mol) in water. He measured 10 grams of KClO3 and dissolved it in a calorimeter containing 250 g of water. The temperature drop was 3.5 K. What is qH2O in Joules? What is qdissolution in Joules? What is the ΔHdissolution in kilojoules per mole? What is the ΔHdissolution in kilojoules per mole?
The efficiency of striated muscle is typically 37%, that is, the muscle converts 37% of the chemical energy reaching it (in the form of glucose) into mechanical work, converts the remainder into waste heat. Your biceps muscle performs mechanical work at the rate of 50 W. (a) What is the rate at which it consumes chemical energy? (b) What is the rate at which it produces waste heat? (c) Given that the oxidation of glucose yields 3.70 103 kcal/kg, what is the rate at which this muscle consumes glucose?
Calculate the enthalpy of solution (in kJ/mol) when 1.6 g of ammonium nitrate was dissolved in 100 ml (100 g) of water. The energy equivalent is 121.5 cal/oC, and the corrected temperature rise is 0.92oC. Compare the value you obtain with the one reported in literature, and calculate the percentage error in the measurement.
Find the internal energy of 30 g of Argon gas (Ar) at 90°C. (Molar mass of Argon; Mr = 40 g mol-1, Avogadro constant; NA = 6.022 ×1023 mol-1, Boltzmann constant; k = 1.38 ×10-23 JK-1)
The energy associated with chemical processes is often quoted in kilojoules per mole of reactants. Please derive the conversion factor from eV/molecule to kJ/mol. (1 eV = 60218 × 10-19 J, 1 mole = 6.02214076 × 1023).
The same student wanted to determine the heat of dissolution for potassium chlorate (KClO3, MW: 122.55 g/mol) in water. He measured 10 grams of KClO3 and dissolved it in a calorimeter containing 250 g of water. The temperature drop was 3.5 K. What is qH2O? What is qrxn? What is ΔHrxn?
The same student wanted to determine the heat of dissolution for potassium chlorate (KClO3, MW: 122.55 g/mol) in water. He measured 10 grams of KClO3 and dissolved it in a calorimeter containing 250 g of water. The temperature drop was 3.5 K. What is qrxn?