Using standard heats of formation from Appendix C of your text, calculate the standard enthalpy change, ∆Ho,for each reaction described below. State if the reaction is endothermic or exothermic. [Because your texts oftensupplies values for aqueous ions rather than aqueous salts, write reactions involving aqueous salts as ionic equations.]a)Solid sodium bicarbonate reacts with aqueous hydrochloric acid to yield carbon dioxide gas, liquid water, andaqueous sodium chloride.b)Solid sodium bromide dissolves in water.c)Ammonia gas, NH3, reacts with solid copper(II) oxide to yield nitrogen gas, solid copper, and water vapor.d)Gaseous nitric oxide, NO, reacts with hydrogen gas to yield gaseous dinitrogen monoxide and water vapor.
Types of Chemical Bonds
The attractive force which has the ability of holding various constituent elements like atoms, ions, molecules, etc. together in different chemical species is termed as a chemical bond. Chemical compounds are dependent on the strength of chemical bonds between its constituents. Stronger the chemical bond, more will be the stability in the chemical compounds. Hence, it can be said that bonding defines the stability of chemical compounds.
Polarizability In Organic Chemistry
Polarizability refers to the ability of an atom/molecule to distort the electron cloud of neighboring species towards itself and the process of distortion of electron cloud is known as polarization.
Coordinate Covalent Bonds
A coordinate covalent bond is also known as a dative bond, which is a type of covalent bond. It is formed between two atoms, where the two electrons required to form the bond come from the same atom resulting in a semi-polar bond. The study of coordinate covalent bond or dative bond is important to know about the special type of bonding that leads to different properties. Since covalent compounds are non-polar whereas coordinate bonds results always in polar compounds due to charge separation.
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