Do all the molecules in a 1 mole sample of CHs have the same energy at 273 K? Ex
ID: 589069 • Letter: D
Question
Do all the molecules in a 1 mole sample of CHs have the same energy at 273 K? Explain. 4. 5. Consider a one mole sample of CHs at 273 K. If the temperature is increased, what happens to the average kinetic energy and the average velocity of the molecules? Explain your answer. 6. Consider three identical flasks filled with different gases Flask A: CO at 760 torr and 0°C Flask B: N2 at 250 torr and 0°C Flask C: H2 at 100 torr and 0°C a) In which flask will the molecules have the greatest average kinetic energy? b) In which flask will the molecules have the greatest average velocity?Explanation / Answer
Q4.
gas particles will not have the same energy, since each individual particle has a different speed... ttherefore, accordinfg to
Ek = 1/2*m*V^2
mass is the same for the gas, but velocity different, therefore, E is different
Q5
if T increases, then energy increases, since T is a measurement of the direct average kientic energy of a gas.
the average molecule vleocity msut increase, since Tincreases, then, Ek increases, which implies V increase
Q6
a)
greatest avg. kinetic energy -->they are all the same, sicne T = the same for all the gases
b)
greatest average velocity --> the must pressurized system, which is CO, since high pressure implies faster molecules
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