Question

Ross pours water at 6.0 C into a container with a pressure of 23. torr. He then boils the water to a temperature of 34 C. The volume changes to 18. mL and pressure to 78. torr. What was the initial volume of the water?

Answer 1

What's wrong with using

(P1V1/T1) = (P2V2/T2)
Remember to use T in kelvin. Convert C to K with
K = 273 + C.