IB Question 8

IB Question 8 - (2) (b) State the meaning of the term S . A...

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Review Question # 8 Name David Tsai Here is a sample question on the subject of Energetics from a previous IB Test. 1. The equation for the decomposition of calcium carbonate is given below. CaCO 3 (s) CaO(s) + CO 2 (g) At 500 K, ∆ H for this reaction is +177 kJ mol –1 and ∆ S is 161 J K –1 mol −1 . (a) Explain why ∆ H for the reaction above cannot be described as ∆ H f ο . Because the reaction did not happen under STP conditions
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Unformatted text preview: (2) (b) State the meaning of the term S . A change in the entropy. (1) (c) Calculate the value of G at 500 K and determine, giving a reason, whether or not the reaction will be spontaneous.-80323 kJ/mol. The reaction is spontaneous at high temperatures. (3) (Total 6 marks) MNHS IB HL Chemistry 1...
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This document was uploaded on 10/22/2010.

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