Question

What amount of energy is released in the combustion of 5.8 g of c4h10?

Answer 1

287.4 kJ energy is released in the combustion of 5.8 g of C4H10.

from experimental data, heat of combustion of butane is -2874 kJ/mol. means, 2874 kJ energy is released when butane is burnt in the presence of oxygen.

i.e., C4H10 + (13/2)O2 ⇒4CO2 + 5H2O ; ∆H = -2874 kJ.

mass of one mole of butane = 4 × 12 + 10 × 1 = 48 + 10 = 58 g

so, no of mole of butane in 5.8 g = 5.8/58 = 0.1

now amount of energy released = no of mole of butane × heat of combustion of butane

= 0.1 mol × -2874 kJ/mol

= -287.4 kJ

hence, 287.4 kJ energy is released in the combustion of 5.8 g of C4H10.

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Answer 2

Answer:

287.4 kJ energy is released in the combustion of 5.8 g of C4H10.

from experimental data, heat of combustion of butane is -2874 kJ/mol. means, 2874 kJ energy is released when butane is burnt in the presence of oxygen.

i.e., C4H10 + (13/2)O2 ⇒4CO2 + 5H2O ; ∆H = -2874 kJ.

mass of one mole of butane = 4 × 12 + 10 × 1 = 48 + 10 = 58 g

so, no of mole of butane in 5.8 g = 5.8/58 = 0.1

now amount of energy released = no of mole of butane × heat of combustion of butane

= 0.1 mol × -2874 kJ/mol

= -287.4 kJ

hence, 287.4 kJ energy is released in the combustion of 5.8 g of C4H10

Explanation: