The process illustrated below takes place at constant pressure. (The figure is n

Question

The process illustrated below takes place at constant pressure. (The figure is not drawn to scale; the molecules are actually much, much smaller relative to the container) s o 1st attempt Part 1 (0.3 point) See Periodic Table O See Hint Write a balanced equation for the process. (Do not include states of matter.) Part 2 (0.3 point) O See Hint Is wpositive, negative, or zero for this reaction? Choose one: A. positive B. zero C. negative Part 3 (0.3 point) O See Hint Using data from the back of the textbook, calculate the Hann for the formation of 4.00 moles of product. kJ

Explanation / Answer

P1

balanced reaction:

SO2 + O2 = SO3

balance

SO2 + 1/2O2 = SO3

PART 2

W = -P*dV

since

dV = negative, ( decrase in volume)

W = positive

Q3

HRXN = H-SO3 - (H-SO2 + 1/2*H-O2)

HRxn = -395.7 - (-296.8+1/2*0)

HRXN = -98.9 kJ/mol

forn = 4 mol

HRXN total = -4*98.9 = -395.6 kJ

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