Question

When 2.000 g of solid NaOH (∆Hsoln = -445.1kJ/mol) dissolves in 10.00 L of water, how much heat is released?
A. 445.1 kJ
B.44.51 kJ
C. 22.26kJ
D. 11.13

A catalyst causes _______. *
• a change in the particle size of the products
• a change in the temperature of the reactants
• a lowering the activation energy barrier
• a shift in the equilibrium position toward the products

Answer 1

For the first question, the correct answer would be 44.51 kJ. It is calculated by multiplying the amount of the substance in moles by the heat of the solution. For the second question, the correct answer would be a catalyst causes a lowering the activation energy barrier.