For the reaction: 2H₂O(l) + 137 kcal → 2H₂ (g) + O₂ (g), how many kcal are needed to react 50.0 g H₂O(l)?

Name: For the reaction: 2H 2 O(l) + 137 kcal → 2H 2 (g) + O 2 (g), how many kcal are needed to react 50.0 g H 2 O(l)?
Brand: Quizplus
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Question

Quizplus · Accepted Answer

The molar mass of H₂O is 18.02 g/mol. 50.0 g of H₂O is approximately 2.78 moles. Since 2 moles of H₂O require 137 kcal, 2.78 moles will require (137 kcal / 2 moles) * 2.78 moles = 190.7 kcal, which rounds to 190. kcal.

For the Reaction: 2H2O(l) + 137 Kcal → 2H2 (G)

For the Reaction: 2H₂O(l) + 137 Kcal → 2H₂ (G)