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Gases - Coggle Diagram

- - - - Practice questions
        
        Rank the greenhouse gasses in order of least to most potent in terms of heat trapping (1 mark)
        
        Explain the difference between natural and enhanced greenhouse effect (2 marks)
        
        Transport is one of the largest Greenhouse gas emitting industries, contributing up to 26% of the US's greenhouse emissions, whilst livestock only contributes to 3%. Explain why the livestock industry is still heavily scrutinized for their methane emissions, despite the contribution being significantly lower than transport. (2 marks)
      - Key points
        
        Climate change has significant environmental, social and economic impacts.
        
        Increased emissions of greenhouse gases have contributed to an enhanced greenhouse effect, which is also referred to as climate change or global warming.
        
        Human activities, including sourcing and combustion of fossil fuels, land clearing and agriculture, have led to increased emissions of carbon dioxide, methane and water
        
        Carbon dioxide (CO2), water (H2O) and methane (CH4) are important greenhouse gases. Methane is present in the atmosphere in the lowest quantities, but is the most potent at trapping heat.
        
        Greenhouse gases are an important part of the Earth’s atmosphere that stabilise our climate, by trapping some of the suns heat and allowing it to maintain a stable temperature.
  - - - Gas can be measured according to the following quantities
        
        Pressure: 100 kPa = 0.987 atm = 100 000 Pa
        
        Volume: 1 L = 1000 mL
        
        Temperature: 0 C = 273 K; (T inK) = (T in C) + 273
        
        amount (mol)
        
        Use the particle theory to explain the relationships between each of these quantities.
      - SLC are used because they are more practical to uphold in a lab and most gases behave like ideal gases at these conditions
    - - Explain the purpose of using SLC when working with gases in a lab
  - - - Page 482, Woprked example 15.2.5
        
        Calculate the volume, in L, occupied by 2.24 mol of oxygen gas (O2) at a pressure of 200 kPa and a temperature of 50C
        
        Calculate the pressure, in kPa, experienced by 3.56 mol of CO2 in a 2540 mL container at 14 C
  - - - n=m/M
      - n=V/Vm
      - n=PV/RT
      - use the mole ratio in a balanced equation to find the amount of another substance in the chemical reaction (unkown/known)
        
        Sub in amount to any of the stoichiometric formulae to find your answer
    - - A 0.51 g magnesium strip is added to HCl solution and produces an aqueous salt and Hydrogen gas. Write a balanced equation for this reaction and find the mass and volume of Hydrogen gas produced at SLC.
      - 500g of Butane gas undergoes complete combustion to form CO2 and water. Find the volume of oxygen (at SLC) required for this reaction to occur.
        
        what is the mass of CO2 produced by this reaction
        
        How would the volume of oxygen change if it were to be measured at 50 C instead? use particle theory to explain your answer.
  - - - At SLC, find the volume of 3.56 mol of CO2
      - Vm = 24.8 L/mol (of an ideal gas at SLC)