Chemistry
Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energ…
Question
  1. Given the following equation and the molar enthalpy of combustion of methane gas: 

                CH4((g)  +  2O2(g)  -->  CO2(g)  +  2H2O(g);    DHocomb = -802.5 kJ

   How many grams of water can be heated from 20.0oC to 100.0oC using the heat produced by the complete combustion of 5.00 g of methane gas (CH4; molar mass = 16.04 g/mol)? The specific heat of water is 4.184 J/g.K

         (A) 747 g

         (B) 598 g

         (C) 201 g

         (D) 0.747 g

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