Two moles of oxygen at 1 7 ∘ C are heated at constant pressure to 11 7 ∘ C ( R = 8.314 J m o l − 1 K − 1 ). Which statements are correct?

W = n R Δ T = 1663 J. Δ U = n C v Δ T = 2 × 2 5 R × 100 = 4157 J. Q = n C p Δ T = 5820 J. Option D takes Q = Δ U , which ignores the work.

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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoThermodynamics Laws & Specific Heats of GasesMedium2 minQB

PhysicsMediummultiple choice

Two moles of oxygen at $1 7^{\circ}$ C are heated at constant pressure to $11 7^{\circ}$ C ( $R = 8.314$ J $m o l^{- 1}$ $K^{- 1}$ ). Which statements are correct?

Options:(select one or more)

Answer:

A, B, C

Solution:

$W = n R Δ T = 1663$ J. $Δ U = n C_{v} Δ T = 2 \times \frac{5}{2} R \times 100 = 4157$ J. $Q = n C_{p} Δ T = 5820$ J. Option D takes $Q = Δ U$ , which ignores the work.

Subject:PhysicsTopic:Heat & ThermoSubtopic:Thermodynamics Laws & Specific Heats of Gases

⏱ 2mℹ️ Source: QB

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