Question

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Answer 1

1. (a) 300 – 273 = 27°C

(b) 573 – 273 = 300°C

2. (a) 250°C = gas

(b) 100°C liquid as well as gas

3. During the change of state of any matter heat is supplied to the substance. The molecules of this matter use heat to overcome the force of attraction between the particles, at this period of time, temperature remains constant. This extra heat is acquired by the molecules in the form of hidden heat called latent heat to change from one state of matter to the other state.

4. The atmospheric gases are taken in a cylinder with piston fitted on it. By cooling and applying pressure on them, the gases can be liquefied.

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Answer 2

For kelvin ti celsius , the formula is Temperature on k scale = Temperature on Celsius scale + 273 degree = 300 degree = Temp. on c scale +273 degree equals ti Temp. on c scale equals to 300 degree minus 273 degree which equals to .27 degree.