# Homework Help: Thermodynamics, Specific Volume and Density

1. Jan 22, 2012

### bmed90

1. The problem statement, all variables and given/known data

A 1m^3 container is filled with the following

-).12 m^3 of Diamonds
-).15 m^3 of sand
-).2 m^3 of petroleum at 20 deg Celcius
-).53 m^3 of air 2 20 deg celcius and 1 atm pressure

Find overall specific volume and density of container

2. Relevant equations

density (p)= mass/ unit volume

specific volume= volume/unit mass or 1/density

3. The attempt at a solution

Do I need to look up the density for sand, diamonds, petroleum, and air for given conditions and find specific volume from there for each individual substance then add up all the specific volumes? Nothing is mentioned about the mass of each substance they just give volume so I dont know if I need to somehow find the mass of each substance

2. Jan 23, 2012

### bmed90

I guess no one can help me out on this

3. Jan 23, 2012

### 256bits

Yes, you need to find out the mass of each substance in the container, and then find the overall mass in the container. Then convert that an overall density and specific volume.