Q.Convert : a. Exactly 1.5 atm to pascals b. 89 kPa to newton per square metre (Nm-2) c. 101.325 kPa to bar d. -100 degree C to kelvin e. 0.124 torr to standard atmosphere

A gas sample is fully characterised by four interrelated measurable quantities. Mass (m), SI unit kilogram, relates to moles via n = m/M. Volume (V), the space a gas occupies, is commonly measured in litres or cubic metres (SI); since a gas takes the volume of its container, gas volume really means container volume. Pressure (P), force per unit area (P = F/A), has the SI unit pascal (Pa = N/m^2); common non-SI units include bar (1 bar = 1.00x10^5 Pa) and atmosphere (1 atm = 760 mm Hg = 760 torr = 101.325 kPa); gas pressure is measured with a manometer, atmospheric pressure with a barometer. Temperature (T), on the Celsius or, more usefully for gas laws, the absolute Kelvin scale (T(K) = t(deg C) + 273.15), determines the direction …