Question & Answer: Calculate the heat energy released when 29.8 g of liquid mercury at 25.00 degree C is…..

University Science Books presented by Sapling Leaning General Chemistry 4th Edition Constants for mercury at 1 atm I heat capacity of Hg() | 28.0 J(mal-K) melting point enthalpy of fusion 2.29 kJ/mol Calculate the heat energy released when 29.8 g of liquid mercury at 25 00 ℃ is converted to solid mercury at its melting point. , 234.32 K Number kJ Toals ×10

Calculate the heat energy released when 29.8 g of liquid mercury at 25.00 degree C is converted to solid mercury at its melting point. Constants for mercury at 1 atm

Expert Answer

Answer

convert mass to moles

moles = 29.8 / 200.59 = 0.148.

now

Q = q1 + q2

Q = (nC $Delta$ T) + (n $Delta$ H_fus)

Q = (0.148 x 28.0 x 63.68) + (0.148 x 2.29 x 1000)

Q = 2263.89 + 338.92

Q = 2602.81 J /mol

Q = 2.60 KJ

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