Advertisements
Advertisements
प्रश्न
LPG stands for liquefied petroleum gas. Varieties of LPG are marketed including a mixture of propane (60%) and butane (40%). If 10 litres of this mixture is burnt, find the total volume of carbon dioxide gas added to the atmosphere. Combustion reaction can be represented as:
\[\ce{C3H8_{(g)} + 5O2_{(g)} -> 3CO2_{(g)} + 4H2O_{(g)}}\]
\[\ce{2C4H10_{(g)} + 13O2_{(g)} -> 8CO2_{(g)} + 10H2O_{(g)}}\]
उत्तर
% of propane = 60%
% of butane = 40%
Total volume of the mixture = 10 litres
Propane = `60/100 xx 10` = 6 litres
Butane = `40/100 xx 10` = 4 litres
(i) Combustion of propane:
| C3H8(g) | + | 5O2(g) | → | 3CO2(g) | + | 4H2O(g) |
| 1 vol. | 3 vol. | |||||
| 6 litres | ? |
1 vol of propane releases 3 vol of CO2
6 litres of propane releases `3/1 xx 6` litres
(ii) Combustion of butane:
| 2C4H10(g) | + | 13O2(g) | → | 8CO2(g) | + | 10H2O(g) |
| 2 vol. | 8 vol. | |||||
| 1 vol. | 4 vol. | |||||
| 4 litres | ? |
2 vol of butane releases 8 vol of CO2
4 litres of butane releases `8/2 xx 4` = 16 litres
Total CO2 released O2 = 18 L + 16 L
= 34 litres of CO2 gas is added to the atmosphere.
APPEARS IN
संबंधित प्रश्न
Prove the Following :
Oxygen is a diatomic molecule.
Differentiate between 2H and H2
Under the same conditions of temperature and pressure you collect 2L of carbon dioxide, 3L of chlorine, 5L of hydrogen, 4L of nitrogen and 1L of sulphur dioxide. In which gas sample will there be :
a. The greatest number of molecules.
b. The least number of molecules.
Justify your answer.
Samples of the gases O2, N2, CO2 and CO under the same conditions of temperature and pressure contain the same number of molecules represented by X. The molecules of Oxygen, occupy V litres and have a mass of 8 g. Under the same conditions of temperature and pressure :
What is the volume occupied by : 3X molecules of CO? [C=12,N=14,O=16]
How much calcium oxide is formed when 82g of calcium nitrate is heated? Also find the volume of nitrogen dioxide evolved:
2Ca(NO3)2→ 2CaO + 4NO2 + O2 (Ca = 40,N = 14, O = 16)
Calculate the percentage of phosphorus in Calcium hydrogen phosphate Ca(H2PO4)2
The reaction between 15 g of marble and nitric acid is given by the following equation:
\[\ce{CaCO3 + 2HNO3 -> Ca(NO3)2 + H2O + CO2}\]
Calculate the volume of carbon dioxide evolved at S.T.P.
66g of ammonium sulphate is produced by the action of ammonia on sulphuric acid. Write a balanced equation and calculate mass of ammonia required.
Nitrogen and hydrogen react to form ammonia.
\[\ce{N2_{(g)} + 3H2_{(g)}-> 2NH3_{(g)}}\]
If 1000g H2 reacts with 2000g of N2
Will any of the two reactants remain unreacted? If yes, which one and what will be its mass?
Solid ammonium dichromate decomposes as :
\[\ce{(NH4)2Cr2O7 -> N2 + Cr2O3 + 4H2O}\]
If 63 g of ammonium dichromate decomposes. Calculate calculate the mass of chromium (III) oxide formed at the same time.
