Physical Chemistry
2nd Edition
ISBN: 9781133958437
Author: Ball, David W. (david Warren), BAER, Tomas
Publisher: Wadsworth Cengage Learning,
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Chapter 9, Problem 9.19E
(a) How much radiant energy is given off, in
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(b) What is the first law of thermodynamic? Define the
Hess law. Given the following data;
2CIF(g) + 0,(g)
CI,0(g) + F,O(g)
AH = 167.4 kJ
AH = 341.4 kJ
SH = -43,4 kJ
2CIF,(g) + 20,(g) → CĻ0(g) + 3F,O(g)
2F,(2) + O(8) → 2F,O(g)
calculate AH for the reaction
CIF(g) + F(8)
CIF,(g)
Both glucose and fructose are simple sugars with the same molecular formula of C6H12 O6 . Sucrose (C12H22 O11 ), or table sugar, consists of a glucose molecule bonded to a fructose molecule (a water molecule is eliminated in the formation of sucrose). (a) Calculate the energy released when a 2.0-g glucose tablet is burned in air.
(b) To what height can a 65-kg person climb after ingesting such a tablet, assuming only 30 percent of the energy released is available for work? Repeat the calculations for a 2.0-g sucrose tablet.
The net change in the multistep biochemical process of photosynthesis is that CO₂ and H₂O form glucose (C₆H₁₂O₆)and O₂. Chlorophyll absorbs light in the 600 to 700 nm region.(a) Write a balanced thermochemical equation for formation of1.00 mol of glucose. (b) What is the minimum number of pho-tons with λ=680. nm needed to prepare 1.00 mol of glucose?
Chapter 9 Solutions
Physical Chemistry
Ch. 9 - For an object having mass m falling in the z...Ch. 9 - For the system in exercise 9.1, determine the...Ch. 9 - Prob. 9.3ECh. 9 - Prob. 9.4ECh. 9 - Prob. 9.5ECh. 9 - List some unexplainable phenomena from the...Ch. 9 - Draw, label, and explain the functions of the...Ch. 9 - Convert a a wavelength of 218A to cm1, b a...Ch. 9 - Prob. 9.9ECh. 9 - Prob. 9.10E
Ch. 9 - Explain why no lines in the Balmer series of the...Ch. 9 - What are the series limits see the previous...Ch. 9 - The following are the numbers n2 for some of the...Ch. 9 - The Balmer series is isolated from the other...Ch. 9 - Given that the wavelengths of the first three...Ch. 9 - Some scientists study Rydberg atoms, atoms whose...Ch. 9 - Prob. 9.17ECh. 9 - Prob. 9.18ECh. 9 - a How much radiant energy is given off, in...Ch. 9 - Stefans law, equation 9.18, suggests that any body...Ch. 9 - Prob. 9.21ECh. 9 - Betelgeuse pronounced beetle juice is a reddish...Ch. 9 - An average human body has a surface area of...Ch. 9 - Prob. 9.24ECh. 9 - The slope of the plot of energy versus wavelength...Ch. 9 - a Use Wien displacement law to determine the max...Ch. 9 - Prob. 9.27ECh. 9 - Sunburn is caused by ultraviolet UV radiation. Why...Ch. 9 - Calculate the energy of photon having: a a...Ch. 9 - Prob. 9.30ECh. 9 - Integrate Plancks law equation 9.23 from the...Ch. 9 - Calculate the power of light in the wavelength...Ch. 9 - Prob. 9.33ECh. 9 - Work functions are typically given in units of...Ch. 9 - Determine the speed of an electron being emitted...Ch. 9 - Lithium has a work function of 2.90eV. Light...Ch. 9 - Prob. 9.37ECh. 9 - Assume that an electron can absorb more than one...Ch. 9 - The photoelectric effect is used today to make...Ch. 9 - Prob. 9.40ECh. 9 - Prob. 9.41ECh. 9 - Prob. 9.42ECh. 9 - Prob. 9.43ECh. 9 - Prob. 9.44ECh. 9 - Use equation 9.34 to determine the radii, in...Ch. 9 - Prob. 9.46ECh. 9 - Calculate the energies of an electron in the...Ch. 9 - Prob. 9.48ECh. 9 - Show that the collection of constants given in...Ch. 9 - Prob. 9.50ECh. 9 - Equations 9.33 and 9.34 can be combined and...Ch. 9 - a Compare equations 9.31, 9.34, and 9.41 and...Ch. 9 - Label each of the properties of an electron as a...Ch. 9 - The de Broglie equation for a particle can be...Ch. 9 - What is the wavelength of a baseball having mass...Ch. 9 - Electron microscopes operate on the fact that...Ch. 9 - Prob. 9.57ECh. 9 - Prob. 9.58ECh. 9 - Determine under what conditions of temperature and...Ch. 9 - Prob. 9.60ECh. 9 - Prob. 9.61E
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- Some solar-heated homes use large beds of rocks to store heat. (a) How much heat is absorbed by 100.0 kg of rocks if their temperature increases by 12C? (Assume that c=0.82J/gC.) (b) Assume that the rock pile has total surface area 2 m2. At maximum intensity near the earth's surface, solar power is about 170 watts/m2. (1watt=1J/s.) How many minutes will it take for solar power to produce the 12C increase in part (a)?arrow_forwardIn the equation w = P V, why is there a negative sign?arrow_forwardExplain why oceanfront areas generally have smaller temperature fluctuations than inland areas.arrow_forward
- Niagara Falls has a height of 167 ft (American Falls). What is the potential energy in joules of 1.00 lb of water at the top of the falls if we take water at the bottom to have a potential energy of zero? What would be the speed of this water at the bottom of the falls if we neglect friction during the descent of the water?arrow_forwardWhat is the energy of one mole of photons having a wavelength of 550 nm and also find 2.045 g of a new compound with formula C9H8O2 is burned in a bomb calorimeter. During the combustion, the temperature of the calorimeter increases from 21.811 °C to 29.551 °C. [During calibration, the heat capacity of the calorimeter was found to be 11.75 kJ·°C-1.] What is ΔUcomb for this compound in kJ/mol?arrow_forwardTwo positively charged spheres, each with a charge of 2.0x 10-5 C, a mass of 1.0 kg, and separated by a distance of 1.0 cm, are held in place on a frictionless track. (a) What is the electrostatic potential energy of this system? (b) If the spheres are released, will they move toward or away from each other? (c) What speed will each sphere attain as the distance between the spheres approaches infinity?arrow_forward
- 3. (a) Using thermodynamics, explain the difference between a closed system and an open system. (b) State the first law in terms of internal energy of a system. In chemistry, why are changes in the enthalpy rather than internal energy used to study a chemical process. (c) State Hess's law.arrow_forwardThe sun supplies energy at a rate of about 1.0 kilowatt per square meter of surface area (1 watt = 1 J/s). The plants in an agricultural field produce the equivalent of 21 kg of sucrose (C12 H22 O11) per hour per hectare (1 ha = 10,000 m Assuming that sucrose is produced by the reaction m²). 12CO2 (9) + 11H2O(1) → C12H22O11(s) + 120O2(g) AH=5640 kJ calculate the percentage of sunlight used to produce the sucrose – that is, determine the efficiency of photosynthesis in this field. Percent efficiencyarrow_forwardConsider a cloudless day on which the sun shines down across the United States. If 2159 kJ2159 kJ of energy reaches a square meter (m2)(m2) of the United States in one hour, how much total solar energy reaches the entire United States per hour? The entire area of the United States is 9,158,960 km29,158,960 km2.arrow_forward
- In 2008 the approximate energy consumption for the entire population of earth for an entire year was 4.74x10^20 joules. The sun's energy striking the earth is orders of magnitude greater than this...taking the whole surface aea of the earth for an entire year, there is approximately 1.33x 10^16 joules/miles striking the earth's surface per year. if a solar panel was 100% efficient, approximately how big would the surface area (with units of a mile) of the solar panel have to be to meet the energy needs of the people living on earth?arrow_forward(c) Using Hess Law and based on the equations, find enthalpy changes, AH, for this reaction;B N2H4() + H2(g) → 2NH3(g) AHr =? N2H4() +O2(g) → N2(g) + 2HO (g) AP = -543 kJ/mol 2H2(g) + O2(g) → 2H2O (g) AP =-484 kJ/mol N2(g) + 3H2(g) 2NH:(g) AP = -92.2 kJ/molarrow_forwardThe 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).arrow_forward
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