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प्रश्न
Does the substance absorb or liberate any heat energy during the change of phase?
उत्तर
Yes, the substance absorbs or liberates heat during the change of phase.
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संबंधित प्रश्न
Convert the following temperature to Celsius scale:
573 K
Fill in the following blank with suitable words :
The state of matter called ........................ makes a fluorescent tube (or neon sign bulb) to glow.
Explain why, ice at 0° C is more effective in cooling than water at the same temperature.
Draw a labelled diagram of the experimental set-up to study the latent heat of vaporisation of water.
Which of the following factors are responsible for the change in state of solid carbon dioxide when kept exposed to air ?
- increase in pressure
- ncrease in temperature
- decrease in pressure
- decrease in temperature
Give reasons:
How is interconversion of states of matter different from chemical reaction?
Name the phenomenon which causes the following changes:
Conversion of water into steam
A kind of matter which can sublime is
Explain the term vaporization
Prepare a model to demonstrate movement of particles in solids, liquids and gases.
For making this model you will need
- A transparent jar
- A big rubber balloon or piece of stretchable rubber sheet
- A string
- Few chickpeas or black gram or dry green peas.
How to make?
- Put the seeds in the jar.
- Sew the string to the centre of the rubber sheet and put some tape to keep it tied securely.
- Stretch and tie the rubber sheet on the mouth of the jar.
- Your model is ready. Now run your fingers up and down the string by first tugging at it slowly and then rapidly.
