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Description
Flashcards by luucymarieee, updated more than 1 year ago
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Created by luucymarieee
over 10 years ago
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| Question | Answer |
| What is rate of reaction? | How much product is made in a fixed time |
| What makes the collisions between partials more successful? | Higher temperature |
| What makes the collision frequency of reacting particles higher? | Higher concentration |
| What does a catalyst do? | Change the rate of reaction without changing the outcome of the reaction |
| Why are finer powders more combustible? | They have a greater surface area exposed |
| Why does increasing pressure increase the rate of reaction? | Because there are a higher number of collisions |
| How can rate of reaction be calculated using a graph? | Using the gradient of a graph of volume and product against time |
| When is mass conserved as in a chemical reaction? | As the reactants become products |
| Why does the atom economy need to be as high as possible? | To reduce unwanted products |
| Why does the percentage yield need to be as high as possible? | To reduce reactant waste and cost |
| What is the equation for percentage yield? | |
| What is the equation for atom economy? | |
| What process is bond breaking? | Endothermic process |
| What process is bond making? | Exothermic |
| What process is used to make ammonia ? | Continuous |
| What is the batch process used to make? | Pharmaceutical drugs |
| How are chemicals extracted from plants? | By crushing, boiling, dissolving and chromatography |
| Diamonds, graphite and fullerenes and allotropes of what? | Carbon |
| Why can graphite conduct electricity? | It has electrons that can move between layers |
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