In a calorimetry experiment, an unknown metal with a mass of 27.4 g that has been in heated to a temperature of 94.0 °C is placed in a coffee cup calorimeter containing 79.8
g of water initially at a temperature of 22.6 °C. After the water and metal have reached
thermal equilibrium, the final temperature reading of the calorimeter is 28.7 °C.
Calculate the specific heat of the unknown metal in J/gºC.

answer seismograph;

a. the law of proportion states the combination of 2 atoms in a specific ratio to produce multiple compounds such as the given statement of question ‘1st compound contains 88.8 % cu ’ indicates 88.8 g of cu is present along with 11.2 g oxygen in 100 g of compound whereas the statement ‘2st compound contains 79.9 % cu ’ indicates 79.9 g of cu is present along with 20.1 g oxygen in 100 g of compound

1st compound contains 88.8 g cu

for cu

m = 63 g /mol

atomic % = 88.8 /63 = 1.42

for o

m = 16 g /mol

atomic % = 11.2 /16 = 0.7

b. the emperical formula of 1st compound is

cu1.4o0.7

cu2o