<span>The average molar bond enthalpy of the carbon-hydrogen bond in a CH4 molecule is 416 KJ/mol.
(+716.7 + (4 x 218) - (- 74.6) ) / 4
= + 1663.3 / 4
= 416</span>
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The scientist which was credited with first stating that electrons orbit an atomic nucleus was Niels Henrik David Bohr. He was the proponent of the Bohr model of the atom, wherein he states that energy level of electrons are distinct and that electrons revolve on stable orbits within the atomic nucleus but can actually transfer from one orbit (level) to another. The orbitals are called: s, p, d and f orbitals.
The surroundings would lose heat.
<u>Answer</u>:
Organisms living near hydro-thermal vents get their energy from Sulphur.
<u>Explanation</u>:
The hot springs found near the Underwater volcanoes at convergent plate boundaries and spreading ridges are called as Hydro-thermal vents . The organisms that live near these hydro-thermal vents are capable of living in very hot water that has a temperature of 65°C to 100°C that would kill most surface organisms.
Also, organisms present at depth of the hydro-thermal vent are adapted to very high and extreme pressure. The water in this vent are very rich in Hydrogen Sulphide .This hydrogen sulphide has very rich amount of energy. Although the is toxic, the bacteria and other living organism are adjusted themselves to make use of the energy in the Hydrogen sulphide.