how much energy i kj is required to change the temp of 1.00 kg of fe from 25.0 degrees celsius to 1515 degrees celsius?
so it would be q= (.449)(1.00)(1490)-correct?
what units for sph what units watr.
sph is j/g*k and what is watr???
so it would be q= (.449)(1.00)(1490)-correct?
u have j/g*k for sph fe but u used 1.00 kg for mass units don't match.
To calculate the amount of energy required to change the temperature of a substance, we can use the specific heat capacity formula:
q = m * c * ΔT
where:
q is the heat energy (in Joules or J),
m is the mass of the substance (in kilograms or kg),
c is the specific heat capacity of the substance (in Joules per kilogram per degree Celsius or J/kg°C),
ΔT is the change in temperature (in degrees Celsius or °C).
In this case, you want to calculate the energy in kilojoules (kJ). So, the formula would be:
q = m * c * ΔT / 1000
Let's determine the specific heat capacity of iron (Fe). The specific heat capacity of iron is approximately 449 J/kg°C.
Given:
m = 1.00 kg (mass of Fe)
c = 449 J/kg°C (specific heat capacity of Fe)
ΔT = 1515 - 25 = 1490 °C (change in temperature)
Now, substitute the given values into the formula:
q = (1.00 kg) * (449 J/kg°C) * (1490 °C) / 1000
Calculating this will give you the amount of energy in Joules. To convert it to kilojoules (kJ), divide the result by 1000:
q = (1.00 kg) * (449 J/kg°C) * (1490 °C) / 1000 / 1000
Therefore, the correct calculation for q should be:
q = (1.00 kg) * (449 J/kg°C) * (1490 °C) / 1000 / 1000