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Bromomethane, CH3Br, is a toxic, odourless and colourless gas - VCE - SSCE Chemistry - Question 5 - 2016 - Paper 1
Question 5
Bromomethane, CH3Br, is a toxic, odourless and colourless gas. It is used by quarantine authorities to kill insect pests. A simplified reaction for its synthesis is ... show full transcript
Worked Solution & Example Answer:Bromomethane, CH3Br, is a toxic, odourless and colourless gas - VCE - SSCE Chemistry - Question 5 - 2016 - Paper 1
Step 1
Increasing temperature (constant volume)
Answer
Increase
Reasoning: Increasing the temperature raises the average kinetic energy of the reactant molecules. This leads to more frequent and energetic collisions between them. As a result, a greater proportion of these collisions surpasses the activation energy, thus increasing the rate of production of bromomethane.
Step 2
Increasing pressure (constant temperature)
Answer
No change
Reasoning: In this reaction, increasing the pressure does not alter the position of equilibrium significantly because there are equal moles of gas on both sides of the reaction (1 mole of HBr versus 1 mole of CH3Br and 1 mole of H2O). Therefore, while the concentration of the reactants increases, the system will not effectively change the rate of production of bromomethane.