Chemistry
Give reasons for the following :
All temperatures in the absolute (Kelvin) scale are in positive figures.
Answer
The temperature -273°C is called absolute zero and it is theoretically the lowest temperature that can ever be achieved. The absolute (Kelvin) scale has its zero at -273°C. As temperatures lower than -273°C are not possible, hence, all temperatures in Kelvin scale are in positive figures.
Related Questions
The molecular theory states that the pressure exerted by a gas in closed vessel results from the gas molecules striking against the walls of the vessel. How will the pressure change if :
(a) the temperature is doubled keeping the volume constant
(b) the volume is made half of its original value keeping the temperature constant?
Give reasons for the following :
Gases exert pressure in all directions.
(a) What is the need for the Kelvin scale of temperature?
(b) What is the boiling point of water on the Kelvin scale? Convert it into centigrade scale.
Give reasons for the following :
Gases have lower density compared to that of solids or liquids.