Match each of the following with its correct answer The following reaction is : C (s) + 2 S (0) + 87.9 kJ → CS2 () Choose... Choose... inversely endothermic exothermic Based on Charles law, the volume occupies by any sample of gas at a constant pressure is ......... proportional to the absolute temperature directly Choose... Based on Grahams law , the rate of effusion of the gas is proportional to the square root of the molar mass Choose... Based on Boyle's law, the volume occupies by any sample of gas at a constant temperature is proportional to the pressure, Choose... The following reaction is : CH,OH + 3/2 0, - CO 2(9) + 2H,00 + 726.4 kJ (1) Choose...

Match each of the following with its correct answer The following reaction is : C (s) + 2 S (0) + 87.9 kJ → CS2 () Choose... Choose... inversely endothermic exothermic Based on Charles law, the volume occupies by any sample of gas at a constant pressure is ......... proportional to the absolute temperature directly Choose... Based on Grahams law , the rate of effusion of the gas is proportional to the square root of the molar mass Choose... Based on Boyle's law, the volume occupies by any sample of gas at a constant temperature is proportional to the pressure, Choose... The following reaction is : CH,OH + 3/2 0, - CO 2(9) + 2H,00 + 726.4 kJ (1) Choose...

Chemistry: An Atoms First Approach

2nd Edition

ISBN:9781305079243

Author:Steven S. Zumdahl, Susan A. Zumdahl

Publisher:Steven S. Zumdahl, Susan A. Zumdahl

Chapter16: Spontaneity, Entropy, And Free Energy

Section: Chapter Questions

Problem 121MP: Consider a sample containing 5.00 moles of a monatomic ideal gas that is taken from state A to state...

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Consider a sample containing 5.00 moles of a monatomic ideal gas that is taken from state A to state B by the following two pathways: For each step, assume that the external pressure is constant and equals the final pressure of the gas for that step. Calculate q, w, E and H for each step in kJ, and calculate overall values for each pathway. Explain how the overall values for the two pathways illustrate that E and H are state functions, whereas q and w are path functions. Hint: In a more rigorous study of thermochemistry, it can be shown that for an ideal gas: E=nCvTand H=nCpT where Cv is the molar heat capacity at constant volume and Cp is the molar heat capacity at constant pressure. In addition, for a monatomic ideal gas, Cv=32R andCp=52R , where R = 8.3145 J/K mol.
For the process H2O(l)H2O(g) at 298 K and 1.0 atm, H is more positive than E by 2.5 kJ/mol. What does the 2.5 kJ/mol quantity represent?
Consider the reaction between methane and oxygen producing carbon dioxide and water. Suppose that the reaction is carried out in a furnace used to heat a house. If q=890kJ and w=+5kJ, what is E? H at 25C?
A gaseous hydrocarbon reacts completely with oxygen gas to form carbon dioxide and water vapour. Given the following data, determine Hf for the hydrocarbon: Hreaction=2044.5KJ/molhydrocarbonHf(CO2)=393.5KJ/molHf(H2O)=242KJ/mol Density of CO2 and H2O product mixture at 1.00 atm, 200.c = 0.751g/L. The density of the hydrocarbon is less than the density of Kr at the same conditions.
A refrigerator contains approximately 17cubic feet, or about 480 liters, of air. Assuming it acts as an ideal gas with a molar CV of 12.47 J/mol.K, what is the change in U in cooling the air from normal room temperature 22C to refrigerator temperature 4C? Assume an initial pressure of 1.00 atm.
Describe why it is easier to use Gto determine the spontaneity of a process rather than S u
A volume of 1.50 L of argon gas is confined in a cylinder with a movable piston under a constant pressure of 1.22 105 Pa. When 1.25 kJ of energy in the form of heat is transferred from the surroundings to the gas, the internal energy of the gas increases by 1.11 kJ. What is the final volume of argon gas in the cylinder?
For a liquid, which would you expect to be larger, Sfusion or Sevaporation? Why?
Why is it usually easier to use G to determine the spontaneity of a process rather than Su ?
Butane gas, C4H10, is sold to campers as bottled fuel. Its density at 25C and 1.00 atm is 2.38 g/L. What volume of butane gas at 25C and 1.00 atm is required to heat one gallon of water (d=1.00g/mL) from 25C to 98C ? The reaction for the combustion of butane (H f =125.6kJ/mol) is C4H10(g)+132 O2(g)4CO2(g)+5H2O(g)
Arrange the following sets of systems in order of increasing entropy. Assume one mole of each substance and the same temperature for each member of a set.. (a) H2(g), HBrO4(g), HBr(g). (b)H2O(l), H2O(g), H2O(s). (c) He(g), Cl2(g), P4(g)
Water gas is produced from the reaction of steam with coal: C(s)+H2O(g)H2(g)+CO(g) Assuming that coal is pure graphite, calculate H for this reaction.