Answer to Question #148525 in General Chemistry for Varun Gudapati

Question

It is determined that 191.1 J of heat are required to raise the temperature of 4.01 g of a metal alloy of unknown composition by 7.47°C. What is the specific heat capacity of the metal in J/g·°C? Report your answer normally to two decimal places and do not include units.

Answer 1

191.1 J of heat are required to raise the temperature of 4.01 g

of a metal alloy of unknown composition by 7.47°C.

• q=191.1J

• c=0.129 J/g∘C

• ΔT=7.47^OC

We proceed with the solution.

q=mcΔTqcΔT=m1.191 J(0.129 J/g∘C)(7.47∘C)=m54.5g≈m

Thus, the mass of a sample of gold is 54.5g