The elements K and CI react directly to form the compuand Kci according to the i

Question

The elements K and CI react directly to form the compuand Kci according to the intormation above and the table below to answer the questions that follow the questions tg tu the equation above. Refer to the Process K(s) K(g) K(g) K+(g) + r Cl2(g) 2Cl(g) Cl(g) + e- cr(g) MA (kJ/mol) to sHLO 4. How much heat is released or absorbed when 7 It is observed that the reaction producing KCI 0.050 mol of Cl,(8) is formed from KCI(s)? (A) 87.4 kJ is released (B) 43.7 kJ is released (C) 43.7 kJ is absorbed (D) 87.4 kJ is absorbed from its elements goes essentially to completion. Which of the following is a true statement about the thermodynamic favorability of the reaction? (A) The reaction is favorable and driven by an (B) The reaction is unfavorable and driven by an (C) The reaction is favorable and driven by both (D) The reaction is unfavorable due to both enthalpy change only entropy change only enthalpy and entropy changes enthalpy and entropy changes 35 What remains in the reaction vessel after equal masses of K(s) and Cl () have reacted until either one or both of the reactants have been

Explanation / Answer

34 ) answer : (B) 43.7 kJ is released

solution :

K (s) + 1/2 Cl2   ----------------> KCl     delta H = - 437 kJ

here 0.5 mol Cl2 --------------- > - 437 kJ

0.05 mol Cl2   --------------> ?? kJ

delta H = 0.05 x - 437 / 0.5 = - 43.7 kJ

heat released = - 43.7 kJ

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