Calorimetry Flashcards

Calorimetry

The process of measuring the amount of heat released or absorbed during a chemical reaction (exothermic or endothermic).

Calorimetry Principle

A quantifiable measurement of the amount of heat energy transferred into a system and its relation to temperature.

Energy in Calorimetry

The amount of energy generated to the body that is often stored in its chemical form.

Law of Conservation of Energy in Calorimetry

The heat gained by water in the calorimeter must have been released by the sample or the reaction taking place in the calorimeter.

Calorimeter

Measures the heat evolved or absorbed by the system of interest by measuring the temperature change in the surroundings.

Actual Measurement in Calorimetry

Temperature change for the calorimeter and the calorimeter constant are used to determine the amount of heat released by a reaction.

Coffee-Cup Calorimeter

A polystyrene (Styrofoam) cup with a lid used to measure heat flow in a solution.

Chemical reaction in the coffee cup calorimeter

The heat of the reaction if absorbed by the water.

Coffee-Cup Calorimeter Equation

qreaction = ‒ mwater x cwater x ∆T; qreaction = ‒ qcalorimeter; qreaction = ‒ qwater

Bomb calorimeter

Used to measure heat flows for gases and high-temperature reactions.

Reaction in a bomb calorimeter

A sealed metal container, which is placed in the water in an insulated container.

Bomb Calorimeter Equation

qreaction = ‒ qcalorimeter; qreaction = ‒( qwater + qbomb); qreaction = ‒ Ccalorimeter x ∆T