How much heat is needed to raise the temperature of 20g of copper from 20 degrees celcius to 40 degrees celcius? (The specific heat of copper is 385J/Kg degrees celcius)
pls help me the quantity of heat required to raise the temperature of 500g of copper from 16oc+116oc assuming the specific heat capacity of copper =400j/kgk
To calculate the amount of heat needed to raise the temperature of a substance, we can use the formula:
Q = (m) x (c) x (ΔT)
Where:
Q = amount of heat (in joules)
m = mass of the substance (in kilograms)
c = specific heat capacity of the substance (in joules per kilogram per degree Celsius)
ΔT = change in temperature (in degrees Celsius)
In this case, the mass of copper is 20 grams, but we need to convert it to kilograms by dividing by 1000:
m = 20g / 1000 = 0.02 kg
The specific heat capacity of copper is 385 J/kg degrees Celsius:
c = 385 J/kg degrees Celsius
The change in temperature is:
ΔT = 40 degrees Celsius - 20 degrees Celsius = 20 degrees Celsius
Now we can plug these values into the formula:
Q = (0.02 kg) x (385 J/kg degrees Celsius) x (20 degrees Celsius)
Calculating this expression gives us the answer:
Q = 0.02 kg x 385 J/kg degrees Celsius x 20 degrees Celsius = 154 joules
Therefore, 154 joules of heat are needed to raise the temperature of 20g of copper from 20 degrees Celsius to 40 degrees Celsius.