Tuesday
July 22, 2014

Homework Help: chemistry

Posted by timmy on Thursday, April 4, 2013 at 9:34pm.

In the reaction between formic acid (HCHO2) and sodium hydroxide, water and sodium formate (NaCHO2) are formed. To determine the heat of reaction, 75.0 mL of 1.07 M HCHO2 was placed in a coffee cup calorimeter at a temperature of 20.8 C, and 45.0 mL of 1.78 M NaOH, also at 20.8 C, was added. The mixture was stirred quickly with a thermometer, and its temperature rose to 25.3 C. Write the balanced chemical equation for the reaction. Calculate the heat of reaction in joules. Assume that the specific heats of all solutions are 4.18 J g-1C-1 and that all densities are 1.00 g mL-1. What is the heat of reaction per mole of acid (in units of kJ mol-1).

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