Question

A concrete block (B-36 x10 °C-') of volume 100 mat 40°C is cooled to

-10°C. What is the change in volume? *
A. It will increase by 0.18 m
B. It will decrease by 0.18 m'
C.It will increase by 0.05 m
D. It will decrease by 0.05 mº

Answer 1

• T1=40°C=313K
• T_2=-10°C=263K

Applying Charles law

`\\ \sf\Rrightarrow (V_1)/(T_1)=(V_2)/(T_2)`

`\\ \sf\Rrightarrow (100)/(313)=(V_2)/(263)`

`\\ \sf\Rrightarrow V_2=(26300)/(313)`

`\\ \sf\Rrightarrow V_2=84.02ml`