IB Multiple Choice - Enthalpy & Energy
Chemistry: IB Diploma Higher Level, topic 4.1.4
Test yourself on IB Multiple Choice - Enthalpy & Energy
Would you expect barium sulfate to be more or less soluble than magnesium sulphate?
Estimate the amount of electrical energy required over 24 hours, in kWh, to keep the bed from cooling.
Note that 1 kilowatt-hour (kWh) = 3.6 × 106 J. Assume that the density of water is 1.0 g/mL and it takes as much energy to keep the water at 29.4 °C as to heat it from 22.2°C to 29.4°C. Also also assume that only the water is going to be heated.
What can we deduce about the two reactions from the energy diagrams?
Which of the following can we conclude about reaction (a) and (b) after looking at the energy diagrams?
When KNO3 is dissolved in water, the resulting solution is significantly colder than the water was originally. Which statement provides the best explanation for this?