a. Explain why energy is needed for boiling even though the temperature of the liquid remains constant.
Question:
a. Explain why energy is needed for boiling even though the temperature of the liquid remains constant.
This diagram shows an apparatus that can be used to measure the specific latent heat of vaporisation of nitrogen.
b. Suggest why the nitrogen is contained in a vacuum flask.
c. The change in mass of the nitrogen is measured over a specific time interval with the heater switched off. The heater is switched on, transferring energy at 40 W, and the change of mass is found once more.
The results are shown in the table.
Calculate the specific latent heat of vaporisation of liquid nitrogen.
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a Energy is needed to boil a liquid even when the temperature is constant because boiling requires t...View the full answer
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Related Book For 
Cambridge International AS And A Level Physics Coursebook
ISBN: 9781108859035
3rd Edition
Authors: David Sang, Graham Jones, Gurinder Chadha, Richard Woodside
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