According to Charles's Law, the equation is as
V1/T1 = V2/T2
V1 = 600.0 mL ; V2 = ?
T1 = 273 + 20 = 293 K
T2 = 273 + 60 = 333 K
(600.0 mL)/(293 K) = V2/(333 K)
V2 = (333 K)(600.0 mL)/(293 K) = 681.9 mL
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