Thermo Chemistry Key Terms

Topics: Energy, Thermodynamics, Entropy Pages: 1 (283 words) Published: October 18, 2010
Energy- the capacity to do work
Law Of Conservation of Energy- Energy can be converted from one form to another but can not be created nor destroyed Potential Energy- energy due to position or composition
Kinetic Energy- energy due to the motion of the of the object and depends on the mass of the object and its velocity. KE= 1/2mv^2 Heat- is the transfer of energy between two objects.
Work- is force acting over a distance
Pathway- The way that energy transfer is divided between work and heat and its specific conditions State Function/State Property- refers to a property of a system that depends only on its present state. Constant Volume- Delta E= q + w =q = qv

Hess’s Law- in going from a particular set of reactants to a particular set of products, the change in enthalpy is the same whether the reaction takes place in one step or a series of steps. Standard Enthalpy of Formation- The change in enthalpy that accompanies the formation of one mole of a compound from its elements with all substances in their standard states. Standard State- A precisely defined reference state.

Fossil Fuels- The result of plants that by photosynthesis storing energy that can be claimed by burning the plants or decay to gain energy Petroleum- A thick dark liquid composed mostly of hydrocarbons that contain carbon and hydrogen Natural Gas- Consists mostly of methane but contains, euthane, propane, and butane as well Coal- formed from the remains of plants that were buried and subjected to high pressure and heat over long periods of time Green House effect- where a dense atmosphere is responsible for the high surface temperature Syngas- Synthetic Gas
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