posted by Akitsuke on .
1. A glass flask whose volume is exactly 1000cm^3 at 0 degrees Celsius is completely filled with mercury at this temperature. When the flask and mercury are heated to 100 degrees Celsius, 15.2cm^3 of mercury overflow. If the coefficient of volume expansion of mercury is 18 x 10^-5 per Celsius degree, compute the coefficient volume expansion of the glass.
The increase in volume of the mercury MINUS the increase in the flask is the overflow. The flask volume expansion is
delta Vf = V *(alphag) * delta T
Voverflow = deltaVm - deltaVg
Use that relationship and the calculated expansion of the mercury volume, delta Vm, to solve for alphag, the coefficient of thermal expansion of the glass.
I can't the answer. I don't understand. the answer in the book is 2.8 x 10^-5 per degree Celsius.
15.2 = 1000 * (alpham-alphag)* 100
alpham - alphag = 15.2*10^-5
alphag = 18*10^-5 - 15.2*10^05 = 2.8*10^-5
wow thanks. it made my mind clear. thank you. :)