A piece of potassium metal is added to water in a beaker. The reaction that takes place is 2K (s) 2H20 (/) ... 2KOH (aq) H2 (g) Predict the signs of w, q, liU, and / iH

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Adrian

Chemistry

26 May, 23:10

A piece of potassium metal is added to water in a beaker. The reaction that takes place is 2K (s) 2H20 (/) ... 2KOH (aq) H2 (g) Predict the signs of w, q, liU, and / iH

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Duckling · Answer 1

The given reaction is exothermic. So ΔH is negative.

Gas is evolving so work done by gas is positive or w is positive.

Change in internal energy that is ΔU is negative.

q = u - w

u is negative, w is positive so q is negative.