If the specific heat of copper is 0.711 j/g•°c, how much copper would it take if the heat given off is 54.85 calories and the temperature change is 205°c.

m = 1574.02 g

Explanation:

Given data:

Specific heat capacity of copper = 0.711 j/g.°C

Mass of copper = ?

Calories given off = 54.85 Cal (54.85 × 4184 = 229492.4 j)

Temperature changes = 205°C

Solution:

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

Q = m.c. ΔT

m =  Q / c.ΔT

m = 229492.4 j / 0.711 j/g.°C.205°C

m = 229492.4 j / 145.8 j/g

m = 1574.02 g

the increase of protons   hope this

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