Chapter 3 Stoichiometry and the combustion of fuels

Question 1

Bar

Answer 1

A unit of pressure. 1 bar = 100 kPa

Question 2

Gas constant

Answer 2

The constant, R, in the Universal Gas equation PV=nRT. R=8.31 J K^-1 mol^-1 where pressure is measured in kPa, volume in L and temperature in K.

Question 3

Ideal gas

Answer 3

A gas which obeys the Universal Gas equation at all temperatures and pressures.

Question 4

Kelvin scale

Answer 4

The absolute temperature scale. Deg K = deg C +273.

Question 5

Pascal

Answer 5

Unit of pressure equal to 1 newton per square metre where pressure = force/area

Question 6

Pressure

Answer 6

The force exerted per unit area of a surface.

Question 7

Standard atmosphere

Answer 7

One standard atmosphere (1 atm) is the presure required to support 760 mm of mercury (760 mm Hg) in a mercury barometer at 25 deg C One atmosphere pressure is approximately the pressure experienced at sea level.

Question 8

Standard conditions

Answer 8

Standard reference conditions to compare testing of experimental activities.
Conditions at which :
gas pressure is 100 kPa or 1 bar, the temperature is 25 deg C (298 K);
and the concentration of any dissolved species is 1.0 M.

Question 9

Standard Laboratory Conditions (SLC)

Answer 9

Conditions at which gas pressure is 100 kPa (1 bar) temperature is 25 deg C (298 K). One mole of an ideal gas at SLC has a volume of 24.8 litres.

Question 10

Standard Temperature and Pressure (STP)

Answer 10

Conditions at which gas pressure is 100 kPa (1 bar) temperature is 0 deg C (273 K). One mole of an ideal gas at SLC has a volume of 22.7 litres.

Question 11

Universal gas equation

Answer 11

PV=nRT which is the equation which describes the behaviour of an ideal gas.