Enter your answer in the provided box. Calculate the work done (in joules) when
ID: 553814 • Letter: E
Question
Enter your answer in the provided box. Calculate the work done (in joules) when 47.1 g of tin dissolves in excess acid at 1.04 atm and 22°C. Assume ideal gas behavior. Sn(s) + 2H+(aq) Sn2+(aq) + H2(g)Enter your answer in the provided box. Calculate the work done (in joules) when 47.1 g of tin dissolves in excess acid at 1.04 atm and 22°C. Assume ideal gas behavior. Sn(s) + 2H+(aq) Sn2+(aq) + H2(g)
Enter your answer in the provided box. Calculate the work done (in joules) when 47.1 g of tin dissolves in excess acid at 1.04 atm and 22°C. Assume ideal gas behavior. Sn(s) + 2H+(aq) Sn2+(aq) + H2(g)
Explanation / Answer
Work done in a chemical reaction
Change in volume = final volume - initial volume
Volume change in primarily due to the formation of H2(g)
Therefore,
by ideal gas behaviour,
work done = P(final volume - initial volume)
= P x volume occupied by H2 gas
We know,
PV = nRT
or,
V = nRT/P
feeding this in above relation,
work done = nRT
with,
n = moles of Sn = 47.1 g/118.71 g/mol = 0.40 mol
R = gas constant = 8.314 J/K.mol
T = 22 oC + 273 = 295 K
So,
work done = 0.40 x 8.314 x 295
= 981.052 J
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