| Heat is one of many parameters measured in the | | | | and its surroundings effectively zero during the |
| calorimetry lab; or any laboratory for that matter. | | | | experiment. |
| One of the instruments used in the measurement of | | | | Since the calorimeter runs in an adiabatic |
| heat in these laboratories is an adiabatic calorimeter. | | | | environment, any heat generated by the sample |
| During a chemical reaction, reactants are converted | | | | being tested causes an increase in temperature, |
| into products. If the reaction requires heat to create | | | | which then fuels the reaction. The adiabatic |
| these products, the reaction is called endothermic. | | | | calorimeter is never completely adiabatic, since some |
| Heat flows into the system, causing the reactants to | | | | of the sample heat will always be lost to the sample |
| convert to products. If the reaction creates heat it is | | | | holder. |
| considered to be an exothermic reaction. It is often | | | | Ultra-sensitive calorimetry is an important technique |
| desirable to determine the magnitude and direction of | | | | for molecular-level research and product testing. It is |
| the heat flow for a particular reaction. | | | | instrumental in the analysis and development of |
| The process used to measure this heat flow is called | | | | pharmaceutical and polymer products in the modern |
| calorimetry - this is the science of measuring the heat | | | | calorimetry lab. Even though it saves researchers, |
| of chemical reactions or physical changes as well as | | | | chemists and engineers a significant amount of time |
| heat capacity and is the focus of work performed in | | | | and money, it is probably one of the best kept |
| a calorimetry lab. | | | | product development secrets. |
| Differential scanning calorimeters, isothermal | | | | Calorimetry also plays an important role in |
| microcalorimeters, titration calorimeters and | | | | biotechnology applications by providing researchers |
| accelerated rate calorimeters are some of the other | | | | with crucial data on the thermodynamics, structure, |
| common types of calorimeters. A simple calorimeter | | | | stability and functionality of proteins, nucleic acids, |
| consists of a thermometer attached to a metal | | | | lipids and other biomolecules. It is also a vital research |
| container that is full of water and suspended above a | | | | tool in the pharmaceutical, genetic, energy and |
| combustion chamber. Measuring the heat flow in a | | | | material fields. Calorimetry in general and the adiabatic |
| reaction requires a closed system, namely a | | | | calorimeter in particular can be used in any area that |
| calorimeter or depending on the application, an | | | | requires the measurement and controlled manipulation |
| adiabatic calorimeter. | | | | of substances and interactions at the molecular level. |
| This type of calorimeter is used to examine a | | | | A calorimetry lab enables researchers and product |
| reaction that is out of control. In most systems that | | | | developers to gather thermodynamic information that |
| are without special precautions, the system not only | | | | was difficult or impossible to obtain using previous |
| exchanges enthalpy with its surroundings, but also | | | | generations of instruments techniques. These |
| experiences a change in its temperature. To prevent | | | | calorimeters are especially useful because of the |
| the complications this can create, thermochemists | | | | amount and accuracy of the data they extract, as |
| use these well insulated instruments in the calorimetry | | | | well as their ability to acquire data using very small |
| lab, keeping the transfer of energy (and enthalpy) as | | | | samples. |
| heat across the boundary between the calorimeter | | | | |