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Triple point of water is...

Triple point of water is

A

`273.16^@C`

B

`273.16 K`

C

`273.16^@F`

D

`0.15 K`

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A gas thermometer measures the temperature from the variation of pressure of a sample of gas. If the pressure measured at the melting point of lead is 2.20 times the pressure measured at the triple point of water, find the melting point of lead.

Answer the following : (a) The triple-point of water is a standard fixed point in modern thermometry. Why ? What is wrong in taking the melting point of ice and the boiling point of water as standard fixed points (as was originally done in the Celsius scale) ? (b) There were two fixed points in the original Celsius scale as mentioned above which were assigned the number 0^(@)C" and "100^(@)C respectively. On the absolute scale, one of the fixed points is the triple-point of water, which on the Kelvin absolute scale is assigned the number 273.16 K. What is the other fixed point on this (Kelvin) scale ? (c ) The absolute temperature (Kelvin scale) T is related to the temperature t_(c) on the Celsius scale by t_(c)=T-273.15 Why do we have 273.15 in this relation, and not 273.16 ? (d) What is the temperature of the triple-point of water on an absolute scale whose unit interval size is equal to that of the Fahrenheit scale ?

Two ideal gas thermometer A and B use oxygen and hydrogen respectively . The following observations are made: Temperature, Pressure therometer A, Pressure therometer B Triple point of water, 1.250xx10^(5)Pa , 0.200xx10^(5)Pa Normal melting point of sulphur, 1.797xx10^(5)Pa , 0.287xx10^(5)Pa (a) What is the absolute temperature of normal melting point of sulphur as read by thermometers A and B ? (b) What do you think is the reason for the slightly different answers from A and B ? (The thermometers are not faulty). what further procedure is needed in the experiment to reduce the discrepancy between the two readings.

Write short note on triple point of water

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At the triple point of water wheater the relative amounts of ice, water and vapour fixed or not. Explain.

SL ARORA-Thermal Properties of Matter-Exercise
  1. At what temperature is the Fahrenheit scale reading equal to (a) twi...

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  2. Resistance of tungsten wire at 150^(@)C is 133 Omega. Its resistance t...

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  3. Triple point of water is

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  4. The mechanical equivalent of heat J is

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  5. During constant temperature, we feel colder on a day when the relative...

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  6. When a body is heated, then maximum rise will be in its

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  7. A composite rod made of copper (alpha =1.8xx10^-5 K^-1) and steel (alp...

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  8. If the temperature of a rod is increased by 10^@C, its length increase...

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  9. The volume of a gas at 20^(@)C is 100 cm 3 at normal pressure. If it i...

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  10. The coefficient of volumetric expansion of mercury is 18xx10^(-5)//^(...

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  11. Coefficient of real expension of mercury is 0.18 xx 10^(-3//@)C. If th...

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  12. The density of a substance at 0^(@)C is 10 g//c c and at 100^(@)C, its...

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  13. A uniform metal rod is used as a bar pendulum. If the room temperature...

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  14. Calculate the presure required to stop the increases in volume of a co...

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  15. A clock which keeps correct time at 20^(@)C is subjected to 40^(@)C. I...

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  16. When water is heated from 0^@C to 20^@C its volume

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  17. Amount of heat required to raise the temperature of a body through 1 K...

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  18. Specific heat of a substance is a function of its

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  19. A body of mass 5 kg moving with a velocity 10 m/s collides with anothe...

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  20. Water falls from a height 500 m. what is the rise in temperature of wa...

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