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TGS Specific Latent Heat - Recap Questions JBI

Last updated almost 5 years ago

15 questions

1

The melting point of lead is 327oC
The boiling point of lead is 1774oC

The melting point of Oxygen is -219oC
The boiling point of Oxygen is-183oC

At - 200 °C what state will the oxygen be in?

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The melting point of lead is 327oC
The boiling point of lead is 1774oC

The melting point of Oxygen is -219oC
The boiling point of Oxygen is-183oC

At -450 °C what state will the lead be in?

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The graph shown alongside shows how the temperature of a pure substance changes as it is heated (click to enlarge)
At what temperature does the substance melt? ................

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Label the section of the graph with a letter X where the substance is a liquid only and with a letter Y where it exists as both a liquid and solid at the same time.

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If the heater provides 100J of heat energy every second use the graph to calculate the energy required to melt this substance

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If 1.5 kg of the substance was used, use your answer to Q5 to calculate the specific latent heat of fusion for this substance.

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Latent heat of fusion is the energy needed to change 1Kg of a substance from

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Latent heat of vaporisation is the energy needed to change 1Kg of a substance from

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An electric kettle produces 2000 J of energy each second. It is filled with water, weighed and switched on. After coming to the boil, it is left on for a further 120 seconds and is then switched off. It is found to be 90 g lighter. Calculate the specific latent heat of vaporisation from this data.