Answer:
The student did not work with absolute temperatures, and the answer should be 85 kPa.
Explanation:
where, P is the pressure of the gas in atm.
V is the volume of the gas in L.
n is the no. of moles of the gas in mol.
R is the general gas constant,
T is the temperature of the gas in K.
P₁T₂ = P₂T₁
P₁ = 100.0 kPa, T₁ = 60.0°C + 273 = 333.0 K.
P₂ = ??? kPa, T₂ = 10.0°C + 273 = 283.0 K.
∴ P₂ = P₁T₂/T₁ = (100.0 kPa)(283.0 K)/(333.0 K) = 84.98 kPa ≅ 85.0 kPa.
The student did not work with absolute temperatures, and the answer should be 85 kPa.
The student did not work with absolute temperatures, and the answer should be 85 kPa.
Explanation:
We can use the general law of ideal gas: PV = nRT.
where, P is the pressure of the gas in atm.
V is the volume of the gas in L.
n is the no. of moles of the gas in mol.
R is the general gas constant,
T is the temperature of the gas in K.
If n and V are constant, and have two different values of P and T:
P₁T₂ = P₂T₁
P₁ = 100.0 kPa, T₁ = 60.0°C + 273 = 333.0 K.
P₂ = ??? kPa, T₂ = 10.0°C + 273 = 283.0 K.
∴ P₂ = P₁T₂/T₁ = (100.0 kPa)(283.0 K)/(333.0 K) = 84.98 kPa ≅ 85.0 kPa.
So, the right choice is:
The student did not work with absolute temperatures, and the answer should be 85 kPa.
