Questions asked by kemi

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• If 15.5 grams of aluminum, wit an initial temperature of 25.0 degrees Celsius, absorbs 155 joules of heat energy, what will be its new temperature?
  
• If 125 grams of ice cools from -1.1 degrees Celsius to -5.7 degrees Celsius, how many Joules of heat were transferred from the ice?
  
• How many grams of ice at 0 degrees celsius & 101.3 kPa could be melted by the addition of 0.400kj of heat?
  
• How many kilojoules of hear are required to melt a 10.9 gram Popsicle at 0 degrees Celsius & 101.3 kPa? Assume the Popsicle has the same molar mass and heat capacity of water
  
• If 575 grams of frozen ethonal are warmed to the freezing point of ethanol, how much heat is required to melt all of this frozen ethanol, CH3CH2OH, at the freezing point? The molar heat of vaporization of ethanol= 4.95 kj/mol
  
• How many kilojoules of heat are released when 2500 grams of gaseous ethanol at its boiling point are converted to liquid ethanol and then cooled down by 55 degrees celsius?
  
• How much heat, in kilojoules, must be lost by 155 grams of steam at 125 degrees celsius to convert steam to water and then cool the water to 20.0 degree celsius?