1a- An electric heater supplies 16.9 joules of energy to 24.8-g sample of H2O originally at 35.3 C. Compute the final temperature (in C). Hint The molar heat capacity of sample of H2O is 75.291 J mol-1 K-1.

1b- When 3.45 g of a salt dissolves in 150. mL of water (density = 1.00 g/mL) in a coffee-cup calorimeter, the temperature rises from 11.2C to 26.7C. Determine q for the solution process, assuming that Ccal~ Cwater. Include the mass of salt in your calculation. Hint :