CHEMISTRY Calculate the standard entropy change for the reaction 2Mg(s) + O2(g)

Question

CHEMISTRY

Calculate the standard entropy change for the reaction 2Mg(s) + O2(g) rightarrow 2MgO(s) using the data from the following table: Express your answer to four significant figures and include the appropriate units. Calculate the standard-state entropy for the following reaction: 1 CH4(g) + 2 O2(g) rightarrow 1 CO2(g) + 2 H2O(1) (If applicable, coefficients of one have been included for clarity.) The standard entropy values are given in the table. Express your answer with the appropriate units.

Explanation / Answer

standard entropy change= entropy(product) - entropy (reactant) = 27*2-(205+32*2)= -215 j/k.mol for first reaction = 189*2+214-(205*2+186)= -4 j/k.mol for second reaction

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