Hello,
Can some one tell me if I came to the correct answer...
Thank You
For coal-
0.314
How much heat energy is required to raise the temperature of 5 kilograms of coal from 20 degrees celsius to 220 degrees celcius?
my answer:
1,314,718 J
Mandi--Do you check back on the boards to see if anyone has answered your question? There are two partial answers at the site below where you first posted.
Yes, but I was asked if I had what number I calculated the coal with in the problem... 0.314
Though,
Thanks for the help
a gas is 550.280 kPa its gage pressure is
To determine whether your answer is correct, we can use the formula for calculating heat energy:
Q = mcΔT
Where:
Q = heat energy (in joules)
m = mass (in kilograms)
c = specific heat capacity (in joules per kilogram per degree Celsius)
ΔT = change in temperature (in degrees Celsius)
First, we need to find the specific heat capacity for coal. The specific heat capacity represents the amount of heat energy required to raise the temperature of a specific substance by 1 degree Celsius. However, specific heat capacities can vary depending on the type of coal. Assuming a specific heat capacity of 0.314 J/g°C, we need to convert it to joules per kilogram per degree Celsius.
1 gram = 0.001 kilograms
0.314 J/g°C * 0.001 kilograms/gram = 0.000314 J/kg°C
Now, we can solve for heat energy (Q):
Q = (mass) * (specific heat capacity) * (change in temperature)
Q = 5 kg * 0.000314 J/kg°C * (220°C - 20°C)
Q = 5 kg * 0.000314 J/kg°C * 200°C
Q = 0.314 J * 200
Q = 62.8 J
Therefore, the correct answer for the amount of heat energy required to raise the temperature of 5 kilograms of coal from 20 degrees Celsius to 220 degrees Celsius is 62.8 J, not 1,314,718 J.