Calorimetry Lab Report
MODULE 2
WORKSHEET
6
CALCULATIONS
INVOLVING GASES
Syllabus reference 9.3.2
1
Two identical gas flasks, A and B, are kept at the same temperature and pressure. Flask A contains
10 g of ethane gas, C2H6. Flask B contains sulfur dioxide gas, SO2. Calculate the mass of sulfur dioxide gas in flask B. moles ethane 10/30 0.33 mol moles SO2 0.33 mol mass SO2 0.33 64 21 g
2
What mass of nitric oxide, NO, is present in a 2.5 L flask at a pressure of 100 kPa and 0ºC? mole NO 2.5/22.71 0.1101 mol mass NO 0.1101 30 3.3 g
3
Carbon monoxide burns in oxygen according to the equation:
2CO(g) O2(g) → 2CO2(g)
Calculate the volume of oxygen required at 25°C and 100 kPa for the combustion of 28 g of carbon monoxide. moles CO 28/28 1 mol …show more content…
a Write a balanced equation for the reaction.
C2H5OH(l) 3O2(g) → 2CO2(g) 3H2O(l) b If 98 L of CO2 is formed at 25°C and 100 kPa, calculate the mass of ethanol used in the reaction. moles CO2 98/24.79 3.95 mol moles ethanol 3.95/2 1.98 mol mass ethanol 1.98 46 91 g
c
Use the data from part b to calculate the volume of liquid water formed when the products are condensed at 25°C and 100 kPa. moles water 3.95 3/2 5.925 mol volume water 5.925 18 107 mL
5
It has been estimated that 1 108 tonne of H2S gas is released annually into the atmosphere from biological sources. This H2S is oxidised to SO2 according to the
WORKSHEET
6
CALCULATIONS
INVOLVING GASES
Syllabus reference 9.3.2
1
Two identical gas flasks, A and B, are kept at the same temperature and pressure. Flask A contains
10 g of ethane gas, C2H6. Flask B contains sulfur dioxide gas, SO2. Calculate the mass of sulfur dioxide gas in flask B. moles ethane 10/30 0.33 mol moles SO2 0.33 mol mass SO2 0.33 64 21 g
2
What mass of nitric oxide, NO, is present in a 2.5 L flask at a pressure of 100 kPa and 0ºC? mole NO 2.5/22.71 0.1101 mol mass NO 0.1101 30 3.3 g
3
Carbon monoxide burns in oxygen according to the equation:
2CO(g) O2(g) → 2CO2(g)
Calculate the volume of oxygen required at 25°C and 100 kPa for the combustion of 28 g of carbon monoxide. moles CO 28/28 1 mol …show more content…
a Write a balanced equation for the reaction.
C2H5OH(l) 3O2(g) → 2CO2(g) 3H2O(l) b If 98 L of CO2 is formed at 25°C and 100 kPa, calculate the mass of ethanol used in the reaction. moles CO2 98/24.79 3.95 mol moles ethanol 3.95/2 1.98 mol mass ethanol 1.98 46 91 g
c
Use the data from part b to calculate the volume of liquid water formed when the products are condensed at 25°C and 100 kPa. moles water 3.95 3/2 5.925 mol volume water 5.925 18 107 mL
5
It has been estimated that 1 108 tonne of H2S gas is released annually into the atmosphere from biological sources. This H2S is oxidised to SO2 according to the