Quiz
AQA GCSE Chemistry Unit 3.3
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Perguntas do quiz (20)
1In the equation Q = mcΔT, what does c stand for?
- AEnergy released
- BMass heated
- CSpecific heat capacity
- DChange in temperature
2In the equation Q = mcΔT, what does ΔT stand for?
- AEnergy released
- BMass heated
- CSpecific heat capacity
- DChange in temperature
3True or false? To find out the energy released per gram, we measure the change of mass in fuel and divide by that value.
- AVerdadeiro
- BFalso
4True or false? To find the energy released per mole, we divide the energy released per gram by the relative formula mass of the substance.
- AVerdadeiro
- BFalso
5Why do simple calorimeters not give an accurate reading for temperature change?
- AThey do not have sophisticated data loggers
- BA lot of thermal energy is not transferred to the solution in the calorimeter
- CThe calorimeter only allows pre-set temperature changes to occur
6Which of these are features of a simple calorimeter?
- ACup made of copper
- BCup made of polystyrene
- CNo lid is present
- DA lid is present
7What would be the correct equation if 50g of acid was mixed with 50g of alkali causing a temperature rise of 9°C?
- AQ = 50 * 4.2 * 9
- BQ = 100 * 4.2 * 9
- CQ = 100 * 8.4 * 9
- DQ = 50 * 8.4 * 9
8True or false? When measuring energy changes in solutions, we assume the solution behaves like water.
- AVerdadeiro
- BFalso
9In an exothermic reaction, which side of the energy level diagram has more energy?
- AReactants
- BProducts
10In an endothermic reaction, which side of the energy level diagram has more energy?
- AReactants
- BProducts
11True or false? The energy change of a reaction is the difference between the maximum activation energy and the energy of the products.
- AVerdadeiro
- BFalso
12How would an energy level diagram be different if a catalyst were present?
- AThe activation energy would be higher
- BThe activation energy would be lower
- CThe reactants would have less energy
- DThe products would have more energy
13True or false? Bond breaking is exothermic.
- AVerdadeiro
- BFalso
14What unit are bond energies measured in?
- AkJ
- BkJ/g
- CkJ/mol
- DkJ/cm^3
15True or false? The bond energy needed to break a particular bond is the same as the bond energy released in forming that bond.
- AVerdadeiro
- BFalso
16What is the ΔH of a reaction?
- AThe bond energy of forming products - the bond energy of breaking reactants
- BThe bond energy of breaking reactants - the bond energy of forming products
- CThe bond energy of forming reactants - the bond energy of breaking products
- DThe bond energy of breaking products - the bond energy of forming reactants
17Which gas is being looked at as a possible alternative to petrol fuels?
- AOxygen
- BNitrogen
- CHydrogen
- DCarbon dioxide
18True or false? The only waste product of the combustion of hydrogen is water.
- AVerdadeiro
- BFalso
19What do we use to combust hydrogen?
- AInternal combustion engine
- BFuel cell
- CDowns cell
20Which of these are disadvantages of using hydrogen as a fuel?
- AIt is not very inflammable
- BThere are safety problems due to flammability
- CIt takes up a lot of storage space
- DAt present we only have a limited supply
- EHydrogen is toxic to humans
Informações
- Descrição
- Twenty questions on the third section in Unit 3 of AQA GCSE Chemistry: Energy calculations.
- Autor
- Matthew T
- Idioma
- English
- Visualizações
- 167
- Etiquetas
- Avaliação
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