Mass: the more the mass of the particles reacting is, the slower they move and so less numbers of collisions which leads to slower rate of reaction
More mass = less number of collisions = slower rate of reaction
B- Gas Molecules Stimulation:
1- What happens to Particles Speed as the Temperature increases?
The speed of the particles increases significantly as the heater temperature increases
2- Does the shape of the Velocity Histogram changes as temperature increases? Why or Why not?
The shape of the velocity histogram does not change when the temperature changes because there are always particles which have greater or smaller velocities and energies than the average velocity at a particular temperature
C- Virtual Laboratory – Kinetic Theory of Gases:
1- What does each curve show?
On the graph, N represents the number of particles which is on the Y axis. The curve shows that as the temperature increases the velocity increases but (N) decreases. In other words, Velocity is directly proportional to temp. while (N) is inversely proportional to temp.
2- Why is the area the curves all the same regardless of temperature?
Because the area in the graph represents the number of particles and the number of particles stays the same no matter what change happens to the temperature.
3- Why do relatively small increases in temperature, give such large increases in reaction rate?
The reaction rate increases greatly because with every small increase in temperature, the number of collisions increases so is the energy of those collisions in disproportionately large way
4- How does this curve compare with the velocity histogram that you saw in the last part?
They have the same shape and the shape of both is not affected by temperature change
D- Kinetic Theory 1
1- What happens to the distribution of speeds of the particles when you run the simulation?
The distribution of speeds becomes unequal as the simulation starts. Some particles move faster than others.
2- What is the relationship between this distribution histogram and the Maxwell-Boltzmann distribution that you saw in the last part?
Both have the same shape. The area in both represents the number of particles and so the shape of both histograms is not affected by the change in temperature.