Work done in isobaric expansion Steps:

• Use formula for work by gas at constant pressure: W = P ΔV.
• Convert volumes to SI units: 900 cm³ = 9 × 10⁻⁴ m³, 1100 cm³ = 1.1 × 10⁻³ m³.
• Calculate change in volume: ΔV = 1.1 × 10⁻³ m³ - 9 × 10⁻⁴ m³ = 2 × 10⁻⁴ m³.
• Compute work: W = (1.3 × 10⁵ Pa) × (2 × 10⁻⁴ m³) = 26 J. Why A is correct:
• Applies the definition of work in thermodynamics for isobaric processes, W = P ΔV, yielding exactly 26 J. Why the others are wrong:
• B: Equals pressure alone (130 Pa, ignoring ΔV or using wrong units).
• C: Results from doubling the correct work, perhaps miscalculating ΔV as 0.0004 m³.
• D: Unrelated large value, possibly confusing pressure with another quantity like 10³ Pa × 1 m³.

Final answer: A