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Hey guys, I seem to have come across a contradicting question in the 2010 DAT Destroyer Chem section, and need your help figuring this out.
Q21 states: Consider five identical 1.0 liter flasks at 1 atm pressure and 25°C containing Cl2 , Ar, NH3, CH4 N2. Which statement is false?
a) Cl2 flask has the highest density
b) NH3 and CH4 have the fastest velocity
c) All gases have the same average kinetic energy
d) All gases contain an equal number of molecules
e) All are true
the answer for Q21 is E. the answer choice I have a problem with is c)All gases have the same average kinetic energy. The explanation in the back says " since the temperature is the same, all molecules have the same kinetic energy"
The part that trips me up is that Q38 states:
Which statement is false?
a) Kr has a lower average speed than Ne at the same temperature
b) The molecules of a gas undergo many collisions with each other and with the walls of the container
c) Deviations from the ideal gas law are greater at low temperature and high pressure
d) All molecules of an ideal gas have the same kinetic energy at constant temperature
e) all are true
The answer for Q38 is d) All molecules of an ideal gas have the same kinetic energy at constant temperature. I thought the answer was e since according to Q21 all molecules have the same kinetic energy at constant temperature, then a couple questions later this same principle is false? I am very confused, someone please help!!!!
Q21 states: Consider five identical 1.0 liter flasks at 1 atm pressure and 25°C containing Cl2 , Ar, NH3, CH4 N2. Which statement is false?
a) Cl2 flask has the highest density
b) NH3 and CH4 have the fastest velocity
c) All gases have the same average kinetic energy
d) All gases contain an equal number of molecules
e) All are true
the answer for Q21 is E. the answer choice I have a problem with is c)All gases have the same average kinetic energy. The explanation in the back says " since the temperature is the same, all molecules have the same kinetic energy"
The part that trips me up is that Q38 states:
Which statement is false?
a) Kr has a lower average speed than Ne at the same temperature
b) The molecules of a gas undergo many collisions with each other and with the walls of the container
c) Deviations from the ideal gas law are greater at low temperature and high pressure
d) All molecules of an ideal gas have the same kinetic energy at constant temperature
e) all are true
The answer for Q38 is d) All molecules of an ideal gas have the same kinetic energy at constant temperature. I thought the answer was e since according to Q21 all molecules have the same kinetic energy at constant temperature, then a couple questions later this same principle is false? I am very confused, someone please help!!!!
