Advertisements
Advertisements
Question
A given amount of gas A is confined in a chamber of constant volume. When the chamber is immersed in a bath of melting ice, the pressure of the gas is 100 cmHg.
- What is the temperature when the pressure is 10cmHg?
- What will be the pressure when the chamber is brought to 100°C
Advertisements
Solution
(a) V1 = V2 = V
P1 = 100 cm Hg
T1 = 273 K
P2 = 10 cm Hg
T2= ?
`("P"_1 "V"_1)/"T"_1 = ("P"_2 "V"_2)/"T"_2`
`(100 xx"V")/273 = (10 xx"V")/"T"_2`
`"T"_2 = 27.3 "K"`
(b) V1 = V2 = V
P1 = 100 cmHg
P2= ?
T1 = 273 K
T2 = 373 K
`("P"_1 "V"_1)/"T"_1 = ("P"_2 "V"_2)/"T"_2`
`(100 xx"V")/273 = ("P"_2 xx"V")/373`
`"P"_2 = 136.63 "cm of Hg"`
APPEARS IN
RELATED QUESTIONS
A cylinder contains 68 g of ammonia gas at STP.
1) What is the volume occupied by this gas?
2) How many moles of ammonia are present in the cylinder?
3) How many molecules of ammonia are present in the cylinder?
[N = 14, H = 1]
Ammonia may be oxidized to ni trogen monoxide in the presence of a catalyst according to th e equation as:
4NH3 + 5O2 → 4NO + 6H2O
If 27L of reactants are consumed, what volume of ni trogen monoxide is produced at the same temperature and pressure?
If 112 cm3 of hydrogen sulphide is mixed with 120 cm3 of chlorine at STP, what is the mass of sulphur formed?
H2S + Cl2 → 2HCI + S
A gas of 32 g mass has a volume of 20 litres at STP. Calculate the gram molecular weight of the gas.
What do you mean by stoichiometry?
Calculate the volume occupied by 320 g of sulphur dioxide at STP. [S = 32; O = 16]
When carbon dioxide is passed over red hot carbon, carbon monoxide is produced according to the equation :
\[\ce{CO2 + C -> 2CO}\]
What volume of carbon monoxide at S.T.P. can be obtained from 3 g of carbon?
From the equation:
\[\ce{C + 2H2SO4 -> CO2 + 2H2O + 2SO2}\]
Calculate the volume of sulphur dioxide measured at STP, liberated at the same time.
Define S.T.P.
Write the values of:
standard pressure in:
(i) atm
(ii) mm Hg
(iii) cm Hg
(iv) torr
