Calculate the heat energy released when 19.8 g of liquid mercury at 25.00 °C is converted to solid mercury at its melting point. Constants for mercury at 1 atm heat capacity of Hg(1) 28.0 J/(mol·K) melting point 234.32 K enthalpy of fusion 2.29 kJ/mol

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Calculate the heat energy released when 19.8 g of liquid mercury at 25.00 °C is converted to solid mercury at its
melting point.
Constants for mercury at 1 atm
4p =
kJ
heat capacity of Hg(1)
28.0 J/(mol-K)
melting point
234.32 K
enthalpy of fusion
2.29 kJ/mol
Transcribed Image Text:Calculate the heat energy released when 19.8 g of liquid mercury at 25.00 °C is converted to solid mercury at its melting point. Constants for mercury at 1 atm 4p = kJ heat capacity of Hg(1) 28.0 J/(mol-K) melting point 234.32 K enthalpy of fusion 2.29 kJ/mol
Expert Solution
Step 1

The moles of mercury is calculated

The heat released is calculated using  the given calorimetry data

Mass of mercury=19.8 g

Moles= 19.8/200.6=0.0718 mol

Given data:

Heat capacity of Hg(l), C=28.0 J/(mol⋅K)

Melting point, Tm=234.32 K

Enthalpy of fusion, H°fus=2.29 kJ/mol

Temperature, T=25.00 + 273.15 =298.15 K

 

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