Solve the following problems. 1. How many Joules of heat are given off when 5.0 g of water cool from 75°C
to 25°C? (Specific heat of water = 4.18 J/g*C)
2. How many calories are given off by the water in Problem 1?
(Specific heat of water = 10 col/gC)
3. How many joules does it take to melt 35 g of ice at 0°C? Cheat of fusion - 333 )
4. How many calories are given off when 85 g of steam condense to liquid water?
Theot of vaporization - 539.4 col/a)
5. How many joules of heat ore necemory to raise the temperature of 25 g of water
from 10°C to 60°C?
6. How many calories are given off when 50 g of water at ofreezes?
theat of fusion = 79 72 collo)

These questions are based on the attached photo. the experiment is about burning magnesium metal with oxygen. 1. write the balanced chemical equation for the reaction you are performing. 2. calculate the mass of magnesium metal used in each trial. o trial 1: o trial 2: 3. calculate the actual yield of magnesium oxide for each trial. o trial 1: o trial 2: 4. magnesium is the limiting reactant in this experiment. calculate the theoretical yield of mgo for each trial. o trial 1: o trial 2: 5. determine the percent yield of mgo for your experiment for each trial. o trial 1: o trial 2: 6. determine the average percent yield of mgo for the two trials. your company currently uses a process with a similar cost of materials that has an average percent yield of 91 percent. if the average percent yield of this process is higher than that, this could save the company money. what is your recommendation to the company? support your recommendation using your data, calculations, and understanding of stoichiometry gathered from this lab.