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    Standard Enthalpy of Reaction Question

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    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.

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    Solution Preview

    First, find the q from this reaction to arrive at internal energy, deltaU
    q=448J/K * (-21.1K)

    Since the system is closed off, the volume is constant, so q is the ...

    Solution Summary

    How do you calculate the standard enthalpy of a reaction from data taken from an experiment? All of the math necessary to solve this problem is given.