What is the difference btw. Enthalpy and Calorimetry? Thank you?

Answer 1

Enthalpy is the thermodynamic quantity that is often measured using an apparatus called a calorimeter. Calorimetry is simply the measurement of the changes in heat content of a system using such a device.

The enthalpy is the "heat content" of a system. One never measures or assigns "absolute" values to the enthalpy; it is always measured as a change relative to some reference state. The change in enthalpy in a process is equal to the heat absorbed in that process plus the work done by the process. If no work is done, then the change in enthalpy is equal to the change in heat content of the system.

Some calorimeters are designed so that the volume of the system being measured does not change. These are called "constant-volume" calorimeters, or "bomb calorimeters". If the volume of a system does not change, it cannot do mechanical work, so the heat absorbed or given off by a process in such a calorimeter is equal to the change in enthalpy. (Because of the way the enthalpy is defined, if heat is absorbed in a process, the change in enthalpy is positive, if heat is given off, the enthalpy change in negative.)

Answer 2

"In thermodynamics, the quantity enthalpy, symbolized by H, also called heat content, is the sum of the internal energy of a thermodynamic system plus the energy associated with work done by the system on the atmosphere, which is the product of the pressure times the volume. The term enthalpy is composed of the prefix en-, meaning to "put into", plus the Greek suffix -thalpein, meaning "to heat"."
"Calorimetry is the science of measuring the heat of chemical reactions or physical changes. Calorimetry involves the use of a calorimeter. The word calorimetry is derived from the Latin word calor, meaning heat."

So enthalpy is the total energy of a system (energy that is lost as heat together with energy used to do work) while calorimetry is the amount of energy produced as heat. For example you can say that the enthalpy of 1 gallon of gas in a car is the total amount of energy that it produces to run the car plus the amount of the heat it produces. Calorimetry is just the amount of the heat it produces.

Answer 3

Enthalpy is a property
Calorimetry is a measument method.