Considering ideal gas behavior, the expansion work done (in kJ) when 144 g of water is electrolyzed completely under constant pressure at 300 K is _____ Use: Universal gas constant ( R ) = 8.3 J K − 1

Question

Considering ideal gas behavior, the expansion work done (in kJ) when 144 g of water is electrolyzed completely under constant pressure at 300 K is _____ Use: Universal gas constant ( R ) = 8.3 J K − 1 mol − 1 ; Atomic mass (in amu): H = 1 , O = 16 (mark absolute value as answer)

TestHub · Accepted Answer

in official answer key answer was [-29.95 to -29.8] OR [29.8 to 29.95], we have updated the question to make it valid. H 2 ​ O ( l ) → 144 g 8 mol W = − P Δ V = ​ H 2 ​ ( g ) + − 8 mol − ( Δ n ) RT ​ 2 1 ​ O 2 ​ ( g ) − 4 mol ​ ​ Change in gaseous moles = 12 ⇒ W = − 1000 12 × 8.3 × 300 ​ kJ = − 29.88 kJ . ​

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