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A balloon holding 4.50 moles of nitrogen (N2) gas absorbs 895 J of thermal energy while doing 127 J of work expanding to a larger volume.?
A balloon holding 4.50 moles of nitrogen (N2) gas absorbs 895 J of thermal energy while doing 127 J of work expanding to a larger volume.
(a) Find the change in the balloon's internal energy (in J).
(b) Calculate the change in temperature of the gas (in K).
1 Answer
- jacob sLv 78 months agoFavorite Answer
given
n = 4.50 moles
Q = 895 J
W = 127 J
a) dU = ?
use first law of thermodynamics,
Q = dU + W
==> dU = Q - W
= 895 - 127
= 768 J <<<<<<<<<<<<<------------Answer
b) for diatomic gas,
dU = (5/2)*n*R*dT
==>T = (2/5)*dU/(n*R)
= (2/5)*768/(3*8.314)
= 12.3 K <<<<<<<<<<<<<------------Answer
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