Temperature

Question 1

Thermometric properties of:
mercury-in-glass-thermometer
alcohol in glass thermometer

Answer 1

Volume of a fixed mass of liquid

Question 2

Thermometric properties of:

resistance thermometer

Answer 2

Resistance of a piece of metal wire

Question 3

Thermometric properties of:

Thermocouple thermometer

Answer 3

emf produced by two junctions made by joining wires of different metals

Question 4

Advantages of liquid in glass thermometer

Answer 4

• cheap
• portable
• easily available
• independent of other equipment

Question 4

Advantages of resistance thermometer

Answer 4

• high accuracy
• high sensitivity (detects small change in temp)
• operates over a wide range of temp

Question 5

Advantages of thermocouple thermometer

Answer 5

• can be used in tight spaces or precise locn
• high responsiveness: detects rapidly changing temp
• operates over a wide range of temp

Question 6

How construct a temp scale?

Answer 6

1) Choose an appropriate thermometric substance with a suitable thermometric property (vary linearly with temp)
2) Choose two fixed points (ice points and steam points)
3) Divide interval between two fixed points into 100 equal parts

Question 7

Define ice point

Answer 7

temperature of pure melting ice at standard Patm (0 degree celsius)

Question 8

Define steam point

Answer 8

temperature of steam from pure water boiling at standard Patm (100 degree celsius)