Calorimetry - Page 2
Questions
- How do you determine the mass of a water sample that is heated from an initial temperature of 25 deg C to a final temperature of 100 deg C following the addition of 1200 J of heat energy?
- How many joules are required to heat 250 grams of liquid water from 0°C to 100°C?
- How much boiling water would you need to raise the bath to body temperature (about 37 ∘C)? Assume that no heat is transferred to the surrounding environment. Express your answer to two significant figures and include the appropriate units.
- Suppose you have a #25xx45xx2.5# #"cm"# steel bar whose density is #"7.8 g/cm"^3# at #22^@ "C"#. If #"3.8 kJ"# was imparted into it by solar energy, and the bar's specific heat capacity is #"0.49 J/g"^@ "C"#, to what temperature does it rise?
- A 100.0g ice cube at 0.0°C is placed in 650g of water at 25°C . what is the final temperature of the mixture?
- Given a consistent source of heat, about how much longer would it take to boil 100 g of water at 100°C than to melt 100 g of ice at 0°C?
- How do you calculate total calories of a protein?
- How much heat is required to convert #10g# of ice at #-10^@C# into steam at #100^@C#?
- What is the amount of heat liberated (in kJ) from 327 g of mercury when it cools from 77.8°C to 12.0°C?
- Why would heat lost by warmer water not equal the heat gained by the colder water?
- The specific heat of liquid bromine is 0.226J/g-K and the density is 3.12g/mL, how much heat (J) is required to raise the temperature of 10.0mL of bromine from 25.00 C to 27.30 C?
- A 2.2 g sample of quinone #C_6H_4O_2# was burned in a bomb calorimeter for which the total heat capacity is 7854 J/°C. The temperature of the calorimeter increased from 23.44 C to 30.57 °C. What is the molar heat of combustion of quinone (in kJ/mol)?
- Why is it necessary to stir the calorimeter in an experiment?
- A cup of tea containing 400.0 g of liquid at 20.0 degree C was heated. If 58.5 kJ of heat was added to the tea, what would be the final temperature? Assume that the specific heat is the same as that of water( 4.18 J g c)
- How much energy would it take to melt 1 aluminum soda can if the can starts out at 20°C, melts at 660°C, and has a mass of 14 g?
- What mass of ethanol #C_2H_5OH(l)# must be burned to supply 500.0 kJ of heat?
- How much heat is released when 275 g of water cools from 85.2°C to 38.4 °C?
- What would be the final temperature if you mixed a liter of 20°C water with 2 liters of 40°C water?
- Calcium chloride dissolves in water to form calcium and chloride ions, producing 83kJ of heat per mole. Calculate final temp. when 0.02 moles of calcium chloride is dissolved into 150ml of water at a temperature initially of 19 degrees?
- How much energy would it take to heat 10 g of water from 10 to 15 C?