If the volume of a given mass of gas at STP is 5m³, what will be its volume at the pressure of 104 cm Hg temperature remaining constant.
Please solve....
Answers
STP is usually given as 273.15 K (0°C) and 1 atm.
The combined gas law can be used to answer this question. The formula is:
P1·V1/T1 = P2·V2/T2, where;
P1 = initial pressure = 1 atm
V1 = 27.3 cm^3
T1 = initial temperature 273.15 K
P2 = final pressure = ?
V2 = final temperature = 27.3 cm^3
T2 = 27°C + 273.15 = 300 K = 3.0×10^2 K to represent two significant figures
Rearrange the formula to isolate P2. Insert the known values and solve.
P2 = (P1·V1·T2)/(V2·T1)
P2 = (1 atm·27.3 cm^3·3.0×10^2 K)/(27.3 cm^3·273.15 K) = 1.1 atm to two significant figures
The pressure required is 1.1 atm.
use this formula to solve the original question
Answer:
Use Boyle's law
P1 * V1 = P2 * V2
Put the values from the queations
98* 260 = 50 * V2
V2 = 98*260/50
V2 = 509.6 ml
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