If one atom or molecule is giving electrons, another must be taking (or sharing). That's why the common term is redox reactions. An oxidation reaction occurs when the chemical change of an atom or molecule is accompanied by a net loss of electrons. A reduction reaction is the opposite - a net gain of electrons. Since electrons, like atoms, are not created or destroyed in chemical reactions, an reduction reaction cannot occur without a source of electrons - which is the oxidation reaction. An oxidation reaction cannot occur without a reduction reaction because free electrons are highly reactive will attach themselves to the nearest atom/molecule, effecting reduction.
The cost of installing a central heating system depends on different factors, such as the size of the house, the complexity of the installation and the type of system installed. An average cost for either a heat pump or a gas furnace system in 2014 may be around $10,000 to $20,000, depending on the above factors. Continue Reading.
1 The typical gas furnace cost is $3,000 to $6,000 installed, although higher efficiency models and/or complex installations could push the cost up to $7,500 to $10,000 or more. 2  Oil furnace cost is roughly $2,500 to $5,000 installed, but similar to gas furnace prices, itâs not unheard of to spend $10,000+.he actual cost of a new furnace is subject to vary based on your location, the product selected, the complexity of the installation (i.e. whether the existing ductwork and exhaust flue also need to be upgraded), and other factors. 1  A wall furnace averages $750 to $1,500 installed.