***CHEMISTRY PROBLEM***PLEASE HELP!** To begin your experiment, you will calibra
ID: 889950 • Letter: #
Question
***CHEMISTRY PROBLEM***PLEASE HELP!**
To begin your experiment, you will calibrate your apparatus by injecting an into a sealed reaction bottle while monitoring temperature and pressure. Suppose you inject 30.0 mL of air (initially at a temperature of 23.5 degree C and a pressure of 0.983 atm) into a bottle at the same temperature and pressure. After the injection, the pressure is observed to be 1.014 atm with no change in temperature. How many moles of gas were in the syringe to cause this pressure change? Calculate the mole-to-pressure change ratio (a conversion factor), which will be used in questions 2 and 3 below.Explanation / Answer
Solution :-
A) volume = 30.0 ml = 0.030 L
pressure = 1.014 atm - 0.983 atm = 0.031 atm
temperature = 23.5 C + 273 = 296.5 K
lets calculate the moles of air using the ideal gas equation
PV= nRT
n= PV/RT
R= 0.08206 L atm per mol K
n = 0.031 atm *0.030 L / (0.08206 L atm per mol K * 296.5 k)
n= 3.82*10^-5 mol air
B) mole to pressure change ratio is
3.82*10^5 mol/0.031 atm = 0.001233
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