QUIZ #3, CHEM 001 (Chapter 4) ame: Date: Please show all work and, where applicable, report all numerical answers to the proper number of significant figures.

1. How many joules of heat energy will be required to raise the temperature of 13.5 g of H,O from 25.0 C to 75.0 C? The specific heat capacity of H2O is 4.184 J/g C. [8 pts.)

2. A total of 882.5 J of heat was required to increase the temperature of 50.0 g of an unknown liquid from 20.0 C to 23.0 C. What is the unknown liquid's specific heat capacity? [10 pts.]

3. Is the chemical reaction given below an endothermic or exothermic reaction and is the potential energy of the product higher or lower than the potential energy of the reactants? [7 pts.] 2 NH3 + Heat N2 + 3H2