Question

1. Convert the following
temperature to celsius scale:
a. 300 K
b. 573 K
2. What is the physical 'state of
water at:
a. 250°C
b. 100°C?
3. For any substance, why does the
temperature remain constant
during the change of state?
4. Suggest a method to liquefy
atmospheric gases.
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Answer 1

Step-by-step explanation:

1a) 26.85

b)299.85

2a) gaseous

b) water starts evaporating

3) because the heat applied is utilised in changing the state of matter.

4) by Increasing pressure or decreasing the temperature

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Answer 2

Step-by-step explanation:

1)o concert Kelvin scale into Celsius scale we have to subtract 273 so (a) 300K=300-273=27 ºC, (b) 573K=573-273=300 ºC

2)At 250ºC water exist in only gaseous state. (b) At 100ºC water exist in both gaseous and liquid state.

3)The temperature remain constant during the change of state because the heat supplied is used up in changing the state of matter as it has to work against the force of attraction of molecules

4)The gases can be converted into liquids by bringing its particles closer so atmospheric gases can be liquefied either by decreasing temperature or by increasing pressure.