The heat engine shown in the figure uses 1.9 mol of a monatomic gas as the working substance. Part E What is the engine's thermal efficiency? Express your answer using two significant figures. Figure p (kPa) 600 400- 200 0 0 0.025 0.050 -V (m³) 1 of 1 > ▼ Part E What is the engine's thermal efficiency? Express your answer using two significant figures. View Available Hint(s) —| ΑΣΦ 1 η= Submit ? %

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