A neutralization reaction was carried out in a calorimeter. The temperature of t

Question

A neutralization reaction was carried out in a calorimeter. The temperature of the solution rose from 20.0 °C to 25.6 C. Is this reaction endothermic or exothermic? 1. A neutralization reaction was carried out in a calorimeter. The change in temperature (AT) of the solution was 5.6 °C and the mass of the solution was 100.0 g. Calculate the amount of heat energy gained by the solution (qsol). Use 4.18 J/(g. C) as the specific heat, Cs, of the solution. 2. What is the value of qreaction for the neutralization reaction described in number 2? 3. 4. How many moles of phosphoric acid are contained in 50.0 mL of 0.60 M H3PO4 5. What is the value of AHreaction (in kJ/mol phosphoric acid) if 50.0 mL of 0.60 M H3PO4 was used in the reaction described in number 2?

Explanation / Answer

Ans 1 :

When the reaction absorbs heat it is called as endothermic , whereas when the reaction releases heat , it is called as exothermic reaction.

Here the temperature of the calorimeter rose from 20.0 degrees C to 25.6 degrees C , which indicates that the energy is released in the neutralisation reaction and the reaction is exothermic.

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