Universal gas equation

Question 1

Relationship between volume and pressure when temp and no. particles are the same?

Answer 1

Volume of gas is inversely proportional to pressure

V ∝ 1/P or PV = K (constant at given temp)

Question 2

Relationship between volume and number of particles when pressure and temp are same?

Answer 2

As no. particles increases, volume increases

V ∝n or V/n = K (constant at given temp and pressure)

Question 3

Relationship between volume and temp?

Answer 3

V ∝t or V/t = K (constant at given pressure)

Question 4

What happens as temp increases?

Answer 4

average kinetic energy of gas molecules can increase (therefore they move quicker and collide with walls and other molecules more frequently)

Question 5

What happens when temp increases but volume is the same

Answer 5

pressure increases

Question 6

What happens when temp increases but presure stays the same?

Answer 6

volume can increase (like a balloon)

Question 7

Universal gas equation?

Answer 7

PV = nRT where R is gas constant

Question 8

What is the gas constant?

Answer 8

8.31JK-1mol-1, but only when P is kPa, V is L, n is moles and T is Kelvin scale.

Question 9

what does the Kelvin Scale show?

Answer 9

the relationship between temperature (*C) and volume (mL). When mL = 0, *C = -273.

Question 10

kelvin scale equation?

Answer 10

• Temperature (K) = T (*C) + 273

Question 11

Define: molar volume

Answer 11

the volume occupied by 1 mol of any gas at a particular temperature and pressure.

Question 12

molar volume equation?

Answer 12

V_m=V/n

Question 13

what are standard laboratory conditions?

Answer 13

25*C and 100kPa

Question 14

Define: ideal gas

Answer 14

theoretical gas that does not interact except for during elastic collisions. Molar volume is 24.8 mol L-1

Question 15

in slc, do most gases behave like theoretical gases?

Answer 15

Yes

Question 16

Define: standard temperature and pressure

Answer 16

0*C and 100kPa

Question 17

Molar volume of ideal gas at STP?

Answer 17

22.7