How many joules is required to change the temp of 225 g of lead from 5.0*C to 25*C. specific heat of lead is 0.139J/g*C.
I came up with 5805 and it just doesn't look right.
And I think it is wrong.
q = mass Pb x specific heat Pb x (Tfinal-Tinitial) = 225 x 0.139 x 20 = ?
To calculate the amount of energy required to change the temperature of a substance, you can use the equation:
Q = mcΔT
Where:
Q is the amount of energy required (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 this case, you have:
m = 225 g (mass of lead)
c = 0.139 J/g°C (specific heat of lead)
ΔT = 25°C - 5°C = 20°C (change in temperature)
Now, let's substitute the values into the formula:
Q = (225 g) * (0.139 J/g°C) * (20°C)
Q = 627 J
Therefore, the amount of energy required to change the temperature of 225 g of lead from 5.0°C to 25°C is 627 Joules.
Your calculation of 5805 J appears to be incorrect. Make sure to double-check your calculations and units to ensure accuracy.