Computer Applications
Explain the terms boiling and boiling point. How is the volume of water affected when it boils at 100°C.
Calorimetry
49 Likes
Answer
The change from liquid to gas (or vapour) phase on absorption of heat at a constant temperature is called boiling or vaporisation.
The particular temperature at which vaporisation occurs is known as the boiling point of liquid.
Volume of water increases when it boils at 100° C. 1 cm3 of water at 100 ° C becomes 1760 cm3 of steam at 100 ° C.
Answered By
27 Likes
Related Questions
Explain the following —
(a) The surroundings become pleasantly warm when water in a lake starts freezing in cold countries.
(b) The heat supplied to a substance during it's change of state, does not cause any rise in it's temperature.
The melting point of naphthalene is 80° C and the room temperature is 25°. A sample of liquid naphthalene at 90° is cooled down to room temperature. Draw a temperature-time graph to represent this cooling. On the graph mark the region which corresponds to the freezing process.
1 kg of ice at 0°C is heated at a constant rate and it's temperature is recorded every 30 s till steam is formed at 100°C. Draw a temperature-time graph to represent the change of phases.
The diagram below shows the change of phases of a substance on a temperature-time graph on heating the substances at a constant rate.
(a) What do parts AB, BC, CD and DE represent?
(b) What is the melting point of the substance?
(c) What is the boiling point of the substance?