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April 20, 2014

Homework Help: chemistry

Posted by she on Wednesday, October 10, 2012 at 1:20am.

A 2.50-g sample of powdered zinc is added to 100.0 mL of a 2.00-M aqueous solution of hydrobromic acid in a calorimeter with a total heat capacity of 448 J/K. The observed increase in temperature is 21.1 K at a constant pressure of one bar. Using these data, calculate the standard enthalpy of reaction. Zn(s) + 2HBr(aq) ---> ZnBr2(aq) + H2(g)

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