<span>Consider the following reaction:
2CH3OH(g)→2CH4(g)+O2(g)ΔH=+252.8kJ
Calculate the amount of heat transferred when 27.0g of CH3OH(g) is decomposed by this reaction at constant pressure.
27.0 g </span>CH3OH(g) (1 mol/ 32.05g) = 0.84 mol CH3OH(g)
ΔH =+252.8kJ = Q = 0.84 mol (252.8kJ) = 213 kJ
Answer:
Mass cannot be created or destroyed
Explanation:
The law of conservation of mass states that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations. According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants.
Answer:
Dalton's atomic theory has been modified as
Explanation:
Atoms of same element may not have same atomic mass. For example, some atoms of chlorine have atomic mass 35 amu while others have atomic mass 37 amu. Such atoms of same element having different atomic masses are called isotopes
Answer:
Intermolecular forces are the interactions that exist between molecules. Hydrogen bond typically occurs when a hydrogen atom bonded to O, N, or F, is electrostatically attracted to a lone pair of electrons on an O, N, or F in another molecule. Polarizability is a measure of how the electron cloud around an atom responds to changes in its electronic environment. London forces, also known as dispersion forces are weak interactions caused by the momentary changes in electron density in a molecule. Dipole-dipole are the attractive forces between the permanent dipoles of two polar molecules. All compounds exhibit van der Waal forces.
Explanation:
Molecules interact each other by intramolecular forces. Among them are van der Waal forces, which are weak interactions, so all compounds interacts by this kind of forces. London forces (dispersion forces) are comprised in the group of van der Waal forces, so they are weak forces. Hydrogen bond is a stronger force, which is resposible for the structure of ice and properties of liquid water (water molecules interacts each other by hydrogen bond), so they are very important forces!
Polarizability is the trend of a molecule to became more polar (when exist a net charge differences in the molecule).
