The dissolution of barium hydroxide in water is an exothermic process. which of the following statements is correct? a) the enthalpy of solid barium hydroxide plus pure water is less than that of the solution, at the same temperature. b) the enthalpy of solid barium hydroxide plus pure water is greater than that of the solution, at the same temperature. c) the enthalpy of solid barium hydroxide plus pure water is the same as that of the solution, at the same temperature. d) the temperature of the solution is lower than of the barium hydroxide and water before mixing. e) when barium hydroxide dissolves in water, the system does work on the surroundings.

B

Explanation:

In an exothermic process the enthalpy of the products is smaller than the enthalpy of the reactives, in other words, the difference of enthalpy of the process (which is defined as the enthalpy at the final state of the process minus the enthalpy of the initial state) is negative. In this case, this means that the enthalpy of solid barium hydroxide plus pure water is greater than that of the solution, at the same temperature .

10 years is the answer

consider the reaction below.

 no rx

at 500 k, the reaction is at equilibrium with the following concentrations.

[pci5]= 0.0095 m

[pci3] = 0.020

[ci2] = 0.020 m

what is the equilibrium constant for the given reaction?

0.042

0.42

2.4

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