A vessel contains 50 cc of mercury at 40ºc and heated to 70º c .how much amount of mercury will overflow.

To calculate the amount of mercury that will overflow, we need to determine the expansion of mercury due to the temperature change.

The expansion of a substance can be calculated using the coefficient of volume expansion, which is a constant value for each substance. For mercury, the coefficient of volume expansion is approximately 0.00018 per degree Celsius.

First, let's calculate the expansion of mercury from 40ºC to 70ºC:
Expansion = (Coefficient of volume expansion) * (Initial volume) * (Change in temperature)
= (0.00018) * (50 cc) * (70ºC - 40ºC)

Expansion = (0.00018) * (50 cc) * (30ºC)
= 0.027 cc

Therefore, the amount of mercury that will overflow is 0.027 cc.