1) how much heat is required to melt 22.0g of ice that is at a temperature of -18C (Cice=2.1J/gC)
2) oxygen has a boiling point of -183C. If the top was accidently knocked off a vessel containing 4.00kg of liquid oxygen at -200C, how much heat would the oxygen have to absorb from the air in order to complete vaporize? (Coxygen=0.04J/gC, Lv=213J/g
3) Lead melts at 327C. An amouunt of heat wqual to 25kJ is added to a 1.50kg piece of lead that is at a temperature of 300C. How much of the lead melts? (Clead=0.13J/gC, Lf=24.5J/g)
4) How much heat is required to convert 50.0g of ice at -20C into steam at a temperature of 115C? (Cice=2.1j/gC, Csteam=2.2j/gC)
the C is Celsius.
i need hep with my physics hw. i tried looking at the book but it doesn't help at all.
thank you
2) oxygen has a boiling point of -183C. If the top was accidently knocked off a vessel containing 4.00kg of liquid oxygen at -200C, how much heat would the oxygen have to absorb from the air in order to complete vaporize? (Coxygen=0.04J/gC, Lv=213J/g
3) Lead melts at 327C. An amouunt of heat wqual to 25kJ is added to a 1.50kg piece of lead that is at a temperature of 300C. How much of the lead melts? (Clead=0.13J/gC, Lf=24.5J/g)
4) How much heat is required to convert 50.0g of ice at -20C into steam at a temperature of 115C? (Cice=2.1j/gC, Csteam=2.2j/gC)
the C is Celsius.
i need hep with my physics hw. i tried looking at the book but it doesn't help at all.
thank you