number two

Molecule A is combined with molecule B in a calorimeter filled with water. What is the heat change (Q) of the reaction A+ B for the following scenarios? Show your calculations and upload them as either a picture or a scanned file. Be careful about sign of Q. Choose only one problem per student. (Note: C of water = 4.184 J/g .C) 1. Mass of water = 5.0 g, initial water temperature = 32 C, final water temperature is 20 C. 2. Mass of water = 6.0 g, initial water temperature = 18 C, final water temperature is 27 C. 3. Mass of water = 8.0 g, initial water temperature = 30 C, final water temperature is 15 C. 4. Mass of water = 4.0 g, initial water temperature = 22 .C, final water temperature is 35 .C If the problem you wanted to solve has already been posted, review your peer's solution carefully. If you agree with their work, confirm its correctness and explain why. If you notice any errors, offer polite corrections. Then solve a different problem. If all problems have been solved correctly, create a similar problem with different values and post your solution. Hint: In a closed system: Q(reaction) + Q(water)= 0 Thus: Q(reaction) = - Q(water)