chaper 13 misconceptual questions

rod a has twice the diameter of rod b, but both are made of iron and have the same intial length. Both ods are now subjecated to the same change in temperature (but remain solid. How would the change in the rods lengths compare?

• rod a = rod b

• need to know whether the rods were oclled or heated

The linear expansion of a material depends on which of the following?

• the length of the material

• the change in tmperature of the material

• the type of material

• all of the above

a steel plate has a hole in it with the diameter of exactly 1.0cm when the plate is at a temperature of 20c. A steel ring has an inner diameter of exactly 1cm at 20c. Both the plate and the ring are heated to 100c. which statement is true?

• the hole in the plate gets smaller and the opening in the ring gets larger

• the opening in the ring gets larger but we need the relatuve size of the plate and the hole to know what happens to the hole

• the hole in the plate and the opening in the ring gets larger

• the hole in the plae and the opening in the ring get smaller

one mole of an ideal gas in a sealed rigid container is initially at a temperature of 100c. the tmperature is then increased to 200c. the pressure in the gas

• remains constant

• increases by about 25%

• doubles

• triples

when an ideal gas is warmed from 20cc to 40c the gas's tmperature T appears in the ideal gas law increases by a factor

• of 2

• of 1.07

• that depends on the temperature scale you use

• na

the temperature of an ideal gas increase which of the following is true

• the pressure must decrease

• the pressure must increase

• the pressure must increase while the volume decreasses

• the pressure, the volume, or both, may increase

two identical bottles at the same temperature contain the same gas. if bottle b has twice the volume and contains half the number of moles of gas as bottle a how does the pressure in b compare with the pressure in A

an ideal gas is in a sealed rigid container. The average kinetic energy of the gas molecules depend most on

• the size of the container

• the number of molecules in the container

• the temperature of the gas

• the mass of the molecules

two ideal gases a and b are at the same temperature. if the molecular mass of the molecules in gas a is twice that of the molecules in gas b the molecules root mean sware speed is

• the same in both gases

• twice as grea in a

• 1.4 times greater in a

• 1.4 times greater in b

in a mizture of gases oxygen and helium which statement is valid

• the helium atoms will e moving gaster than the oxygen molecules on average

• both will be moving at the same speed

• the oxygen molecules will on average be moving more rapidly than the helium atoms

• the kinetic energy of heium atoms will exceed that of oxygen molecules