Questions Uploads
Describe how the weak monoprotic acid hydrofluoric acid, HF (used in
aluminum processing) acts when it is added to water, including a description of
the nature of the particles in solution before and after the reaction with water.
If there is a reversible reaction with water, describe the forward and the reverse
reactions.
1. When 3.0 kg of water is warmed from 10 °C to 80 °C, how much heat energy is needed? You must show work, including all units, for all calculations.
2. A calorimeter contains 100 g of water at 39.8 ºC. A 8.23 g object at 50 ºC is placed inside the calorimeter. When equilibrium has been reached, the new temperature of the water and metal object is 40 ºC. What type of metal is the object made from? You must show work, including all units, for all calculations.
1. Why is ΔTmetal < 0?
2. Why is ΔTwater > 0 ?
3. A metal sample weighing 43.5 g and at a temperature of 100.0 °C was placed in 39.9 g of water in a calorimeter at 25.1 °C. At equilibrium, the temperature of the water and metal was 33.5 °C. Determine the specific heat capacity of the metal. You must show work for credit.
A metal sample weighing 43.5 g and at a temperature of 100.0 °C was placed in 39.9 g of water in a calorimeter at 25.1 °C. At equilibrium, the temperature of the water and metal was 33.5 °C. Determine the specific heat capacity of the metal. You must show work for credit.
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