I posted my specific heat wrong. Now, how many joules is required to change temp of 225 g of lead from 5.0*C. specific heat of lead is 0.129J/g*C.
I came up with 5805. It just doesnt look correct. Please help
And it's still wrong. Look at my earlier response. I told you EXACTLY how to do it. You only need to that equation I wrote and change the 0.139 to 0.129 and punch in the numbers.
To calculate the amount of heat required to change the temperature of a substance, you can use the formula:
Q = m * c * ΔT
Where:
Q is the heat energy in joules
m is the mass of the substance in grams
c is the specific heat capacity of the substance in J/g°C
ΔT is the change in temperature in °C
In your case, the mass of the lead is given as 225 g, the initial temperature is 5.0°C, and the specific heat capacity of lead is 0.129 J/g°C.
To find the change in temperature (ΔT), you need the final temperature. However, it is not provided in your question. Assuming you do have the final temperature, let's call it Tf. Then, the change in temperature would be:
ΔT = Tf - 5.0°C
Once you have the ΔT, you can proceed to calculate the amount of heat (Q) using the formula mentioned above.
Let's say the final temperature is 50.0°C, then the change in temperature would be:
ΔT = 50.0°C - 5.0°C
ΔT = 45.0°C
Now, substitute the given values into the formula:
Q = 225 g * 0.129 J/g°C * 45.0°C
Calculating this, you will find:
Q = 1293.225 J
Therefore, the correct amount of heat required to change the temperature of 225 g of lead from 5.0°C to 50.0°C is approximately 1293.225 joules (J).