Answer
(i) positive (ii) negative.
Work Step by Step
Ans:
In an endothermic reaction it absorbs heat from the surroundings so enthalpy change in positive
In an exothermic reaction heat is evolved so enthalpy change is negative.
Chemistry 10th Edition
by Whitten, Kenneth W.; Davis, Raymond E.; Peck, Larry; Stanley, George G.
Published by
Brooks/Cole Publishing Co.
ISBN 10:
1133610668
ISBN 13:
978-1-13361-066-3
Chapter 15 - Chemical Thermodynamics - Exercises - General Concepts - Page 599: 1
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