Arejang
Apr5-08, 09:16 PM
1. The problem statement, all variables and given/known data
You are given a sample of metal and asked to determine its specific heat. You weigh the sample and find that its weight is 30.0 N. You carefully add 1.30×10^4 J of heat energy to the sample and find that its temperature rises 20.0 degrees C.
What is the sample's specific heat?
2. Relevant equations
Q=mc (delta)T
3. The attempt at a solution
I solved for c giving:
c=Q/(m*(delta)T)
I converted the given degrees Celsius to Kelvin by adding 273.15, and converted the 30 Newtons to kg by dividing by 9.8 m/s^2. The resulting numbers, 293.15 was used for delta T, and 2.90 kg was used for m.
This was my resultant value and calculation prior to plug and chug:
1.30*10^4 J/(2.90 kg*293.15 K)
Plug and chug gave me 14.71 J/(kg*K). But it's not the correct answer. Could anyone show me what I did wrong?
You are given a sample of metal and asked to determine its specific heat. You weigh the sample and find that its weight is 30.0 N. You carefully add 1.30×10^4 J of heat energy to the sample and find that its temperature rises 20.0 degrees C.
What is the sample's specific heat?
2. Relevant equations
Q=mc (delta)T
3. The attempt at a solution
I solved for c giving:
c=Q/(m*(delta)T)
I converted the given degrees Celsius to Kelvin by adding 273.15, and converted the 30 Newtons to kg by dividing by 9.8 m/s^2. The resulting numbers, 293.15 was used for delta T, and 2.90 kg was used for m.
This was my resultant value and calculation prior to plug and chug:
1.30*10^4 J/(2.90 kg*293.15 K)
Plug and chug gave me 14.71 J/(kg*K). But it's not the correct answer. Could anyone show me what I did wrong?