Which of the following statements about ideal gases is incorrect ? At a constant
ID: 814216 • Letter: W
Question
Which of the following statements about ideal gases is incorrect?
At a constant temperature, when the pressure increases, the volume decreases.
A gas with a larger molar mass will have a higher density.
At a constant pressure, when temperature increases, volume increases.
At constant volume, when the temperature increases, pressure decreases.
Gas pressure is directly proportional to the number of moles of gas.
In a "coffee cup" (constant-pressure) calorimeter, how is the heat change of the solution related to the heat change of the reaction?
The heat change of the reaction is twice that of the solution.
They are equal in magnitude and equal in sign.
They are equal in magnitude and opposite in sign.
The heat change of the reaction is half that of the solution.
What is the wavelength (in nm) of a photon with a frequency of 3.97 x 1014 1/s?
1630 nm
756 nm
398 nm
521 nm
1149 nm
At a constant temperature, when the pressure increases, the volume decreases.
A gas with a larger molar mass will have a higher density.
At a constant pressure, when temperature increases, volume increases.
At constant volume, when the temperature increases, pressure decreases.
Gas pressure is directly proportional to the number of moles of gas.
In a "coffee cup" (constant-pressure) calorimeter, how is the heat change of the solution related to the heat change of the reaction?
The heat change of the reaction is twice that of the solution.
They are equal in magnitude and equal in sign.
They are equal in magnitude and opposite in sign.
The heat change of the reaction is half that of the solution.
What is the wavelength (in nm) of a photon with a frequency of 3.97 x 1014 1/s?
1630 nm
756 nm
398 nm
521 nm
1149 nm
Explanation / Answer
1.
At a constant volume, when the temperature increases, pressure decreases.
2.
They are equal in magnitude and opposite in sign.
3.
frequency = c/(wavelength)
wavelength = (3 x 10^8 m/s) / (3.97 x 10^14 s^-1)
wavelength = 7.56 x 10^-7 m
= 756 nm
Option B is correct.
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