Chapter 4: (1) Thermal Equilibrium

Question 1

Conditions for thermal equilibrium

Answer 1

1) Same temperature
2)Same rate of heat flow
3) Net heat flow zero

Question 1

An object reaches thermal equilibrium when…

Answer 1

1) Two objects come into contact.
2) Heat will be transferred.
3) Net heat moves from hotter objects to cooler objects.
4) The temperature of the cold object increases, the temperature of hot objects is reduced.
5) When the temperature of the objects is the same, heat transfer is equal and net heat transfer is zero.

Question 2

The benefits of using mercury:

Answer 2

TBC

Question 3

How to increase the sensitivity of a mercury thermometer

Answer 3

TBC

Question 4

What is thermometer calibration and how do you do it?

Answer 4

To calibrate a thermometer means to…
1) Put the correct mark of reading at the correct place so that other temperature can be deduced from these marks.
2) Choose two extreme points to mark its scale and these points must be able to be reproduced accurately.

Usually, we take the steam point of pure water as 100C and the ice point of water as 0C.

Question 5

Steam point of pure water as ___ and the ice point of water as ___.

Answer 5

100C/0C