Chemistry, 03.10.2019 02:50, beeboppity

How do changes in temperature at constant pressure affect the distance between gas particles? a. the motion of gas particles decreases as temperature increases. b. a decrease in temperature increases the distance between gas particles. c. an increase in temperature increases the distance between gas particles. d. the distance between gas particles is only affected by changes in pressure.

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I believe the answer is C. An increase in temperature increases the distance between gas particles. At constant pressure, when there is an increase in temperature the motion of the gas particles will increase. The effect is that increase in temperature increases the kinetic energy of gas molecules, making them move more faster and vibrate more. This will result to an increase in inter-molecular collision hence the molecules will move further and further away from each other.

answered: bikkiecuanas13

option c. an increase in temperature increase the distance between gas particles.

Justification:

Remember that the kinetic energy of the particles is directly related with the temperature. So, as implication as the temperarue increase the kinetic energy increase.

After that remember that the kinetic energy is proportional to the square of the speed of the particles. So, an increase of kinetic energy is related with the increase of the speed of the particles.

Finally, reason that as the speed of the particles is higher the more apart they are and the gas will occupy more space (volume).

In the kinetic theory for ideal gases you do not take in account the intermolecular forces (they are supposed to be inexistent) but you do deal with the fact that the temperature increase the velocity of the molecules which means more speed and more free space among them.

answered: Guest

first, consult an activity series chart to determine if al is more reactive than fe. it is, so it will replace the fe. now, one can continue with the problem.

next, make sure you have a correctly balanced equation.

3feo + 2al ==> 3fe + al2o3

now, determine which reactant (feo or al) is in limiting supply.

moles feo present = 125 g x 1 mole/71.8 g = 1.74 moles

moles al present = 25.0 g x 1 mole/26.98 g = 0.927 moles

since from the balanced equation, it take 3 mol feo for every 2 mol al, al will be limiting.

you can determine this simply by dividing moles of each by their coefficient in the balanced equation. for example: 1.74/3 = 0.58 and 0.927/2 = 0.464. al is less, so it is limiting.

finally, using the stoichiometry in the balanced eq. determine mass of fe that can be produced from 0.927 moles of al.

0.927 moles al x 3 moles fe/2 moles al x 55.8 g/mole = 77.6 g

answered: Guest

i can ! i just need to know what the paragraph is! : p