How much heat is released when 105 g of steam at 100.0°C is cooled to ice at -15.0°C? The enthalpy of vaporization of water is 4
0.67 kJ/mol, the enthalpy of fusion for water is 6.01 kJ/mol, the molar heat capacity of liquid water is 75.4 J/(mol ⋅ ° c., and the molar heat capacity of ice is 36.4 J/(mol ⋅ °
c.
1) (Hvap)(moles of water)=236.9783574kJ (40.67)(105/18.02) 2) (change in temperature)(mass)(Cliquid)=43.9345172kJ (100)(105/18.02)(75.4)/1000 3) (Hfus)(moles of water)=35.01942286kJ (6.01)(105/18.02) 4) (change in temperature)(mass)(Csolid)=3.181465039kJ (15)(105/18.02)(36.4)/1000 Total released=319.1137625kJ
The Deepwater Horizon rig, owned and operated by offshore-oil-drilling company Transocean and leased by oil company BP, was situated in the Macondo oil prospect in the Mississippi Canyon, a valley in the continental shelf.
