Question

The energy change for the dissolution of 2.00 g of potassium hydroxide will be greater than the energy change for the dissolution of 5.00 mmole (millimoles) of potassium hydroxide.

True or False?

Answer 1

Answer – True

Explanation-

We are given the, mass of KOH = 2.00 g and

moles of KOH = 5.00 mmol = 0.005 moles

moles of 2.0 g of KOH = 2.0 g / 56.10 g.mol^-1

                                      = 0.0365 moles

So, the 2.0 g of KOH has more moles than 5.00 mmoles, so the energy change for the dissolution of 2.00 g of potassium hydroxide will be greater than the energy change for the dissolution of 5.00 mmole and it is true.