What is the enthalpy of condensation,in kJ/mol,of bromine whose B. P. is +58.8oC, if 16.2 kJ...

Question

Question

What is the enthalpy of condensation,in kJ/mol,of bromine whose B. P. is +58.8oC, if 16.2 kJ of heat is required to vaporize 86.3 g of bromine

science chemistry

Answer 1

Answer #1

Answer

∆H_cond = -30 kJ/mol

Explanation

Mass of bromine = 86.3g

Molar mass of bromine = 159.81g/mol

Number of moles of bromine = 86.3g/159.81g/mol = 0.5400mol

Enthalphy of vaporization at b.p = (16.2kJ/0.5400ml)×1mol = 30kJ/mol

Enthalphy of condenzation(∆H_cond) = -Enthalphy of vaporuzation(∆H_vap)

∆H_cond = - 30kJ/mol

Answer 2

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