Calculate the amount of heat needed to melt 148. g of solid octane (C8H18 ) and bring it to a temperature of 117.8 degrees c. Round your answer to 3 significant digits. Also, be sure your answer contains a unit symbol.

The amount of heat is 84.4894kJ

Explanation:

Given data:

mass of octane=148g

The moles of octane is:

The melting point is=-56.82°C

ΔHfus=20.73kJ/mol

The heat of fusion is:

The heat to bring the octane to a temperature of 117.8°C is:

The total heat in the process is:

Qtotal=Qfus+Q₂=26.8578+57.6316=84.4894kJ

b..

is the correct one

explanation:

covalent bonds form as valence electrons are shared between two atoms. lewis structures and structural formulas are common ways of showing the covalent bonding in organic molecules. formal charge describes the changes in the number of valence electrons as an atom becomes bonded into a molecule.

a) the particles of the chair are strongly held together.