Question

You are walking on a beach and find a mystery piece of metal. You take it back to your lab and measure its mass to be 0.5 kg. In order to heat the metal 1 degree K, you must add 115 J of heat. Identify the metal. q =mCΔT

Answer 1

Metal : silver

Step-by-step explanation:

It is given that,

Mass of the metal, m = 0.5 kg

Temperature,
`\Delta T=1\ ^0\ K`

Heat, Q = 115 J

Heat absorbed is given by :

`Q=mc\Delta T`

`c=(Q)/(m\Delta T)`

Where,

c is the specific heat of the metal

`c=(115\ J)/(0.5* 1\ ^0K)`

`c=230\ J/kg\ ^0K`

The metal having specific heat equals 230 J/kg °K is silver

Hence, this is the required solution.

Answer 2

For the given question above, I think there is a choice of answers accompanied with the question. Based on my research, the choices are:
A. Brass
B. Copper
C. Platinum
D. Silver


The answer for the question is option D. Silver.
Specific heat = 15 J / 0.5 kg
= 230 J kg-1

Substance Specific Heat (J kg-1 K-1)
Aluminum 900
Copper 390
Brass 380
Silver 230
Platinum 130