2.00 mol of an ideal gas occupies a volume of 1.0L at 300 K and 1 atm pressure.
ID: 498432 • Letter: 2
Question
2.00 mol of an ideal gas occupies a volume of 1.0L at 300 K and 1 atm pressure. If the gas is to 250 K and the pressure is lowered to 0.75 atm the volume occupied by the gas will be: 11 L 9.0 L 0.11 L 0.90 L 1.1 L Under which of the following conditions, will the real gases will approach the behavior of ideal, gas? 10 atm and 200 K 1.5 atm and 200 K 0.5 atm and 20 K 1.0 atm and 500 K 1.0 atm and 273 K A flask contains H_2 and O_2 gas. The rate of diffusion of is H_2: O^2 is: 1:16 13:1 1:4 4:1 8:1 Choose the reaction that represents delta H degree _f for the ionic compound NF_4 Cl. NH_3 (g) + HCl (g) rightarrow NH_4 Cl (s) NH_4 Cl (aq) rightarrow NH_4^+ (aq) + 2Cl^- (aq) 0.5N_2 (g) + 2H_2 (g) + 0.5Cl_2 (g) rightarrow NH_4 Cl(s) 2NH_4 Cl(s) rightarrow 4H_2 (g) + N_2 (g) + Cl_2 (g) NH_4^+ (aq) + 2Cl^- (aq) rightarrow NH_4 Cl (aq) Given the equation 2H_2 (s) + O_2 (g) rightarrow 2H_2 O (g), delta H = -572 kj, which of the following statement(s) is (are) true? The reaction is exothermic it takes 572 kj of energy to produce 36.0 g of water when 36.0 g of water produced, 572 kj of energy is released I only I and II III only I and III II only are J true?Explanation / Answer
(13) D
Because real gases show ideal behaviour at high temperatures and low pressures.
(14) D
Because r1/r2 = (M2/M1)0.5 = (32/2)0.5 = 4:1
(15) C
Because for the enthalpy of formation, the reactants used should all be elementary and in their native states.
(16) D
Because statements I and III both are correct
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