CHEM 152 Worksheet 2, Assignments of Chemistry

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CHEM 152 Quiz section worksheet 2 Name: 1) If, at a given temperature, the equilibrium constant for the reaction Ih(g) | Ch(g) == 21ICI(g) is 4.2, then the equilibrium constant for the reaction HCl(g) == (1/2)H2(g) + (1/2)Ch(g) is? 2) For the hypothetical reactions | and 2, K, = 10° and Ko= 107, 1. Ax(g)+ Big) == 2AB(g) 2. 2A.(g) + Cg) == 2A2C(g) 3. A2C(g) | Bog) = 2AB(g) | (1/2)C2(g) What is the valuc for K for reaction 3? 3) The value of K, for the reaction ILb(g) | O2x(g) = 11;02(g) is 2.3 x 10° at S70K. Determine the value for K-for this reaction at 570K. [Hint: Remember the gas constant R = 0.0821 atm T./ mol K & pay close attention to the unit of R and try to use that for conversion of atm to concentration] 4) The reaction Hyg) +h(g) —=* 2HIg) has K, — 45.9 al 763 K. A particular equilibrium mixture at thal temperature contains gaseous HI at a partial pressure of 4.30 atm and hydrogen gas at a partial pressure of (0.225 atm. What is the partial pressure of I2? 5) At a particular temperature, 8.0 moles of NO, is placed into a 1.0-L container and the NO); dissociates by the reaction: 2NOz (g) == 2NO (g) + O2 (g) At equilibrium the concentration of NO (g) is 2.0 M. Calculate K for this reaction.