how much energy is needed to heat 3kg of aluminium from 21 oC to 50 oC?
Use the info provided by SraJMcGin plus the following:
q= heat needed = mass Al x specific heat Al x (delta T).
Use 50-21 for delta T. You must look up the specific heat of Al.
it didn't give me any help at all could you please help me in another way and maybe find me out the answer
To determine the amount of energy required to heat a substance, you need to use the equation:
Q = mcΔT
Where:
- Q is the amount of energy transferred (in joules)
- m is the mass of the substance (in kilograms)
- c is the specific heat capacity of the substance (in joules per kilogram per degree Celsius)
- ΔT is the change in temperature (in degrees Celsius)
For aluminum, the specific heat capacity (c) is approximately 900 J/kg°C.
Now let's calculate the energy required:
1. Determine the mass:
The given mass of aluminum is 3 kg.
2. Calculate the change in temperature:
ΔT = (50°C - 21°C) = 29°C
3. Plug the values into the equation:
Q = (3 kg) × (900 J/kg°C) × (29°C)
Q = 78300 J
Therefore, the amount of energy needed to heat 3 kg of aluminum from 21°C to 50°C is 78,300 joules (J).