43 A sample of helium gas is in a sealed, rigid container. What occurs as the temperature of the sample is increased?(1) The mas
s of the sample decreases. (2) The number of moles of gas increases.
(3) The volume of each atom decreases.
(4) The frequency of collisions between atoms increases.
Answer is: (4) The frequency of collisions between atoms increases.
The average kinetic energy of molecules depends on the temperature.
As temperature increases, molecules gain more energy from surrounding and move faster and have more collisions.
Kinetic energy (standard unit is the joule J) depends on speed of the molecule.
Charles' Law (The Temperature-Volume Law) - the volume of a given amount of gas held at constant pressure is directly proportional to the Kelvin temperature:
V₁/T₁ = V₂/T₂.
When temperature goes up, the volume also goes up.
Mass of Iron (Fe): 55.845Mass of Bromine (Br): 79.904 You need to multiply the mass of Br by 3 because there are 3 Bromine atoms. (79.904)(3)+ 55.845= 239.712+55.845 = 295.557 g/mol