Give one line/one word to answer the following:
(i) Volume of a gas compared to the solid state.
(ii) Standard temperature of a gas in Kelvin.
(iii) Standard pressure of a gas in mm of Hg.
(iv) Celsius temperature of a gas at 300 K
(v) Volume of a gas at -273°C.
Give one line/one word to answer the following:
(i) Volume of a gas compared to the solid state.
(ii) Standard temperature of a gas in Kelvin.
(iii) Standard pressure of a gas in mm of Hg.
(iv) Celsius temperature of a gas at 300 K
(v) Volume of a gas at -273°C.
(i) The molecules in the case of gases are loosely packed and have weak intermolecular forces of attraction while in the case of Solids, the molecules are tightly packed and the intermolecular forces of attraction are very strong and that’s why the volume of gas is very large as compared to the volume of solids.
(ii) ) The standard values chosen are 0°C or 273K for temperature. These standard values are termed standard temperature.
(iii) The standard values:
For pressure = 1 atmospheric unit (atm)
760 mm Hg
76 cm of Hg
Standard pressure of a gas = 760 mm of Hg
These standard values are termed standard pressure.
(iv) If the temperature value is in the Celsius scale - convert it into a kelvin by adding 273.
If the temperature value is in the Kelvin scale - convert it into Celsius by subtracting 273.
Celsius temperature of a gas at 300 K
300-273 = 27°C.
(v) Volume of gas at -273°C=zero
- Kelvin Scale of Temperature
- It starts with -273° Cit's it's zero.
- All temperatures on the Kelvin scale are positive.
- The magnitude of each degree on the Kelvin scale is the same as on the centigrade scale.
(i) The molecules in the case of gases are loosely packed and have weak intermolecular forces of attraction while in the case of Solids, the molecules are tightly packed and the intermolecular forces of attraction are very strong and that’s why the volume of gas is very large as compared to the volume of solids.
(ii) ) The standard values chosen are 0°C or 273K for temperature. These standard values are termed standard temperature.
(iii) The standard values:
For pressure = 1 atmospheric unit (atm)
760 mm Hg
76 cm of Hg
Standard pressure of a gas = 760 mm of Hg
These standard values are termed standard pressure.
(iv) If the temperature value is in the Celsius scale - convert it into a kelvin by adding 273.
If the temperature value is in the Kelvin scale - convert it into Celsius by subtracting 273.
Celsius temperature of a gas at 300 K
300-273 = 27°C.
(v) Volume of gas at -273°C=zero
- Kelvin Scale of Temperature
- It starts with -273° Cit's it's zero.
- All temperatures on the Kelvin scale are positive.
- The magnitude of each degree on the Kelvin scale is the same as on the centigrade scale.
