Chapter 3: Stoichometry 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=degC+243.

Question 5

Pascal

Answer 5

Unit of pressure equal to 1 newton per square meter 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 pressure required to support 760 mm of mercurt (760 mmHg) in a mercurt 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 100kPa or 1 bar
- the temperature is 25 deg C (298K)
- the concentration of any dissolved species is 1.0M.

Question 9

Standard Laboratory Conditions (SLC)

Answer 9

Conditions at which gas pressure is 100kPa (1 bar), temperature is 25 deg C (298K). 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 100kPa (1 bar) temperature us 0 deg C (273K). 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.