Please I need your help. Thank you 1- A 2.6-L sample of helium gas, collected at
ID: 556941 • Letter: P
Question
Please I need your help. Thank you
1- A 2.6-L sample of helium gas, collected at 0.00°C and 1.00 atm, is compressed into a 0.50-L cylinder. What pressure will the gas exert in the cylinder at 30.0°C?
Pressure = _________ atm
2- What volume (in liters) of air measured at 1.00 atm would have to be put into a bicycle tire with a 1.00-L volume if the pressure in the bike tire is to be 45.0 psi? Assume the temperature of the gas remains constant.
Volume = ________ L
3- What volume of gas in liters at 107°C must be cooled to 49°C if the gas volume at constant pressure and 49°C is to be 3.0 L?
Volume = _________ L
4- A steel tank with a volume of 6.45 L is full of gas at a pressure of 3.35 atm. What volume in liters would the gas occupy at a pressure of 0.240 atm if its temperature did not change?
Volume = _________ L
5- Suppose 14.7 g of CO2 gas was compressed into a 1.50 L steel cylinder at a temperature of 33.0°C. What pressure in atm would the gas exert on the walls of the cylinder?
Pressure = ___________ atm
6- Suppose you put four 150-mL bottles of water into an ice chest filled with crushed ice. If the bottles were initially at a temperature of 25°C, calculate the minimum number of grams of ice that would have to melt in order to cool the water in the bottles to 6°C. Assume the density of water is 1.00 g/mL. The specific heat for liquid water is 1.0 cal/(g °C). The heat of fusion for water is 80. cal/g.
__________________ g
Explanation / Answer
1)
we have:
P1 = 1.00 atm
V1 = 2.6 L
V2 = 0.50 L
T1 = 0.0 oC
= (0.0+273) K
= 273 K
T2 = 30.0 oC
= (30.0+273) K
= 303 K
we have below equation to be used:
(P1*V1)/(T1) = (P2*V2)/(T2)
(1.0 atm*2.6 L)/(273.0 K) = (P2*0.5 L)/(303.0 K)
P2 = 5.77 atm
Answer: 5.77 atm
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