Under which of the following conditions would you expect a simple of N_2 (boilin
ID: 997620 • Letter: U
Question
Under which of the following conditions would you expect a simple of N_2 (boiling point = -196 degree C) to behave most nearly as an ideal gas? 0.005 atm, -160 degree C 0.05 atm, 300 degree C 2000 atm, -160 degree C 2000 atm, 300 degree C behaves ideally under all these conditions Which of the following reactions releases heat to the surroundings as it proceeds to completion? C (coal) + H_2 O (g) + 130 KJ rightarrow CO (g) + H_2 (g) 2 NO_2 (g) rightarrow N_2 O_4 (exothermic) 2 H_2 (g) + O_2 (g) rightarrow 2 H_2 O (g) delta H = -572 kJ i) only i) and iii) i) and iii) ii) and iii) All of the above Given the thermochemical equation: 2SO_2 (g) + O_2 (g) rightarrow 2SO_3 (g) delta H = -197 kJ what is delta H for the formation of 8.00 g of SO_3? -9.85 kJ -19.7 kJ -39.4 kJ -197 kJ none of these How much heat must be removed from a 10.0 g sample of graphite (specific heat = 0.720 J/g K) to decrease its temperature from 55.00 degree C to 44.00 degree C? 0.720 J 7.20 J 7.92 J 79.2 J none of these Given the following two equations and their corresponding enthalpies: CO(g) + 1/2 O_2(g) rightarrow CO_2(g) delta H_1 = -283.0 kJ N_2(g) + O_2(g) rightarrow 2 NO(g) delta H_2 = 180.6 kJ What is the enthalpy of reaction, delta H_for the reaction that follows? CO(g) + NO(g) rightarrow CO_2(g) + 1/2 N_2(g) delta H_= ?? delta H_= -746.6kJ delta H_= -385.4kJ delta H_= -373.3kJ delta H_= -192.7kJ delta H_= -102.4kJ Given the data below, what is delta H degree for the following reaction? 2CH_4(g) + 3O_2(g) rightarrow 2CO(g) + 4H_2O(l)? delta H_f degree[CH_4(g)] = -75 kJ/mol delta H_f degree[CO(g)] = -110 kJ/mol delta H_f degree[H_2O(l)] = -286 kJ/mol -1214 kJ -1514 kJ -321 kJ -842 kJ none of theseExplanation / Answer
A real gas behave most nearly as an ideal gas at high temperatures and low pressures.
Answer.
b. 0.05 atm, 300 ºC
An ideal gas do not have finite volume and do not exert any attraction force between particles.
At low pressures, the volume of the recipient in which the gas is contained is much greater than the volume of a particle of gas, therefore, occurs a reduction in the attraction forces between particles (the size of particle becomes negligible).
At high temperatures, the kinetic energy is so great that the attraction forces between particles becomes negligible.
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