Calculate the kinetic energy of CO at 274 K. Express the answer as Eavg = in joules per mole to three significant figures.
Calculate the kinetic energy of CO2 at 274 K. Express the answer Eavg = joules per mole to three significant figures.
Calculate the kinetic energy of SO3 at 274 K. Express teh answer Eavg = joules per mole to three significant figures.
For gas molecules kinetic energy does not depend on mass of the molecule/s and is given by,
Eavg = (3/2)*nRT
where, n is number of moles of gas, R = ideal gas constant = 8.314 JK-1mol-1; T is absolute temperature.
Given, T = 274 K; so for one mole of any gas,
Eavg = (3/2)*RT = (3/2) * 8.314 * 274 = 3417.05 Jmol-1
Hence, average kinetic energy for any gas (CO or CO2 or SO3 or any other gas) at 274 K
is 3417.05 Jmol-1. Since, answer is to be expressed with three significant figures, it can be approximated as,
3420 Jmol-1.
Answer: Kinetic energy for any gas (CO or CO2 or SO3 or any other gas) at 274 K
is, Eavg = 3420 Jmol-1 = 3.42 kJmol-1. (1000 J = 1kJ)
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