Explain the working of cup calorimeter with a neat labelled diagram
Answers
Answer:
The coffee cup calorimeter is operated at constant pressure (ambient pressure). The cup is partially filled with a known volume of water and a sensitive thermometer is inserted through the lid of the cup so that its bulb is below the water surface.Jan 19, 2017
Explanation:
A calorimeter is a device used to measure the heat flow of a chemical reaction or physical change. The process of measuring this heat is called calorimetry. A basic calorimeter consists of a metal container of water above a combustion chamber, in which a thermometer is used to measure the change in water temperature.
The basic principle is that heat released by the combustion chamber increases the temperature of the water in a measurable way. The temperature change may then be used to calculate the enthalpy change per mole of substance A when substances A and B are reacted.
The equation used is:
q = Cv(Tf - Ti )
where:
q is the amount of heat in joules
Cv is the calorimeter's heat capacity in joules per Kelvin (J/K)
Tf and Ti are the final and initial temperatures
