The question is number 20. Thank you e. -129.7 J/K Which statement is incorrect?

Question

The question is number 20. Thank you

e. -129.7 J/K Which statement is incorrect? a. A process that absorbs energy from its surroundings is called endothermic. b. Kinetic energy is the energy of motion. The Law of Conservation of Energy is another statement of the Third Law of Thermodynamics Potential energy is the energy that a system possesses by virtue of its position or composition Energy is the capacity to do work or to transfer heat. d. ( 1a6 e. 20. From the following data at 25°C S(g) + O2(g) SO2(g) SO2(g) + 1 /202(g) SO3(g) AHo- -296.8 kJ AHo-98.9 kJ Calculate AHr at 25°C for the reaction below. SO3(g) S(s) + 3/22(g) a. +198 kJ b. -396 kJ c. +396 kJ d. +98.9 kJ e. -198 kJ 4

Explanation / Answer

20)

Lets number the reaction as 1, 2, 3 from top to bottom

required reaction should be written in terms of other reaction

This is Hess Law

required reaction can be written as:

reaction 3 = -1 * (reaction 1) -1 * (reaction 2)

So, deltaHo rxn for required reaction will be:

deltaHo rxn = -1 * deltaHo rxn(reaction 1) -1 * deltaHo rxn(reaction 2)

= -1 * (-296.8) -1 * (-98.9)

= 396 KJ

Answer: c

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