Calorimetry - Page 4
Questions
- How much heat would be needed to raise the temperature of 25.0 g of water by 18#"^@#C?
- How many kilojoules are released when 8.2 g of water condenses at 100°C and cools to 15°C?
- When #1.0# #g# of potassium chloride, #KCl#, is dissolved in #25# #mL# (=#25# #g#) of water, it causes the temperature to drop from #24.33^o# #C# to #22.12^o# #C#. What is the molar enthalpy of dissolution for #KCl#?
- If 26.03 g of water showed a temperature increase of 102°C upon addition of hot metal, what is the heat change for the water?
- How do you calculate the amount of heat needed to increase the temperature of 250g of water from 20 C to 56 C? #C_g = 4.8 J/(C-g)#
- To calculate the heat absorbed by an object, what information is needed besides its specific heat?
- How many calories of energy must be added to a 1 gram of water to increase its temperature by 1 degree?
- What energy is required to heat water at #298*K# to water vapour at #373*K# under standard conditions?
- How many calories are absorbed by a pot of water with a mass of 500 g in order to raise the temperature from 20° C to 30° C?
- An unknown volume of water at 18.2°C is added to 33.5 mL of water at 35.0°C. If the final temperature is 23.5°C, what was the unknown volume?
- What is the final temperature if you place 501 g of copper at 89.5 °C in a calorimeter containing 159 g of water at 22.8 °C?
- You have a 189 gram sample of ice at -20°C. What is the total energy required to convert this sample to steam at 115°C?
- A 1,200-watt heater is used for raising the temperature of 1 liter of water to boiling point. How long will it take for the water to boil if the initial temperature of water is 20 C? (1 cal = 4.19 joules?)
- Find the amount of heat energy needed to convert 150 grams of ice at -15°C to ice at -63°C?
- How many joules are in 104 calories? (1 cal = 4.18J)?
- What is a differential scanning calorimeter?
- If 213 J raises a sample of water 8.2°C, what is the mass of the water?
- How much heat is required to convert 5.88 g of ice at -12.0°C to water at 25.0°C, if the heat capacity of ice is 2.09 J/°C?
- How much heat (kJ) is needed to raise the temperature of 100.0 grams of water from 25.0°C to 50.0°C?
- How much heat is given off when 10 grams of water are cooled from 50°C to 40°C?