write an experiment to show that heat is evolved in a chemical reaction between sodium hydroxide and hydrochloric acid
Answers
Answer:
Energy changes always accompany chemical reactions. ... The heat (or enthalpy) of neutralization (ΔH) is the heat evolved when an acid and a base react to form a salt plus water.
Answer:
The foundation of the study of thermochemistry was laid by the chemist Germain Hess, who investigated heat in chemical reactions during the last century. One statement of the law that bears Hess's name says:
The enthalpy change for any reaction depends on the products and reactants and is independent of the pathway or the number of steps between the reactant and product.
In this experiment, you will measure and compare the quantity of heat involved in three reactions. These heats of reaction will be measured using a styrofoam calorimeter. The three reaction are shown below.
Reaction 1: The dissolving of solid sodium hydroxide in water.
NaOH(s) ---> Na+(aq) + OH-(aq) + heat
Reaction 2: The reaction of solid sodium hydroxide with dilute hydrochloric acid.
NaOH(s) + H+(aq) + Cl-(aq) ---> Na+(aq) + Cl-(aq) + H2O
Reaction 3: The reaction of sodium hydroxide solution with dilute hydrochloric acid solution.
Na+(aq) + OH-(aq) + H+(aq) + Cl-(aq) ---> Na+(aq) + Cl-(aq) + H2O..
Explanation:
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