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Help Physics 2 Parts. A container holds 1.4 g of oxygen at a pressure of 7.5 atm . Keeps saying I'm wrong. I'll give best answer.?
PART A: How much heat is required to increase the temperature by 111 ∘C at constant pressure? Answer in J
PART B: How much will the temperature increase if this amount of heat energy is transferred to the gas at constant volume? Answer in ∘C
1 Answer
- peterpanLv 74 years agoFavorite Answer
A)
ΔQ = ΔU + L
ΔQ = 3/2 n R ΔT + p ΔV = 3/2 n R ΔT + n R ΔT = 5/2 n R ΔT
where
n = m / M = 0,04375 mol [M = 32 g (molar mass)]
then
ΔQ = 2.5 * 0.04375 * 8.314 * 111 = 101 J
B)
ΔQ = 3/2 n R ΔT
ΔT = 2 ΔQ / (3 n R)
then
ΔT = 2 * 101 / (3 * 0.04375 * 8.314) = 185 C [or K]
