Question

How many grams of water could have its temperature raised from 25 ºC (room temperature) to 100 ºC (the boiling point of water) by the amount of energy released in the formation of 4.0 mol of H2 from hydrogen atoms? The bond energy of H2 is 435 kJ/mol. The specific heat of water is 4.184 J/g °C. Express your answer in scientific notation.

Answer 1

q = 4 mol x 435 kJ/mol = ? kJ = ? x 1000 J.

q = mass x specific heat x (Tfinal-Tinitial). YOu know Tfinal, Tinitial, specific heat, and q, solve for mass

Answer 2

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