Question

4.Decreasing the volume of the container holding an ideal gas does what? a.It increases the gas pressure because gas particles strike the walls of the container with more momentum on average. b.It does not affect the gas pressure. c.It decreases the gas pressure by slowing the gas particles. d. It increases the gas pressure because gas particles bounce off the walls of the container more often. e.It increases the gas pressure by slowing the gas particles.

5.Which of these is true about the absolute temperature of an ideal gas? a. It is directly proportional to the pressure of the gas particles. b.It does not depend on the average kinetic energy of the gas particles. c. It is directly proportional to the average speed of the gas particles. d.It is directly proportional to the average kinetic energy of the gas particles. e. It is directly proportional to the volume of the gas particles.

6.Which of these is the ideal gas law that relates the temperature T, pressure P, and volume V of n moles of ideal gas consisting of N molecules? a.P = VRT b.P = nRTV c. PV = nRT d.PV = NRT e.PVn = RT

7.You exert a force of 30 N on the head of a thumbtack. The head of the thumbtack has a radius of 5 mm. What is the pressure on your thumb? atm

8.The pressure in each of your car tires is 2.30 multiply.gif 105 Pa. The mass of your car is 1690 kg. Assuming that each of your tires bears one-quarter of the total load, what is the contact area of each tire with the road? m2

9.What can a fluid be? a.a liquid but not a solid or a gas b.a solid but not a liquid or a gas c. a gas but not a liquid or a solid d. a liquid or a solid but not a gas e. a gas or a liquid but not a solid

10.Which is the correct order of the states of matter of a substance, from coldest to hottest? a.plasma, gas, liquid, solid b.solid, liquid, gas, plasma c solid, gas, liquid, plasma d.gas, liquid, solid, plasma e.plasma, liquid, gas, solid

Answer 1

4) correct option is a)

its because volume is inversely proportional to pressure and as we decrease the volume the gas particles collide with each other and the walls of the container with more energy and velocity.

5) correct option is d)

we know a relation

K.E=3/2kT

where k=constant

so average kinetic energy is same as the absolute temperature of an ideal gas.

6) correct oprtion c )

the ideal gas law is given by

PV=nRT

where P=pressure, V=Volume, n=number of moles , R= gas constant , T=absolute temperature,

7) we know the formula

P=F/A= 30N/pi(0.005m)²=382Kpa

so the answer is 382kpa

8) we know that pressure P=F/A

A=F/P

F=mg=1/4*1690*9.8=4140.5kg

P=2.3*10⁵pa

A=4140.5/2.3*10⁵=0.018m²

so the answer is 0.018m²

9) correct option is e)

a fluid cannot be solid because a fluid changes its shape , deforms, they flow and they take the shape of the container and solids does not perform this characters.

10) correct option is b)

when when transition from one state to another , their is loss of thermal energy. and there is drop in pressure as well.