How do I find out how much heat it takes to raise the temperature of 100 grams of aluminum from 50 degrees celcius to 80 degrees celsius. The specific heat is 900j/kg

First I did 100*30*900 and it equalled 2,700,000. that seems to high, is it? I then multiplied 100*30*.9 and got 2700J. Which is the right equation?

To find out how much heat it takes to raise the temperature of a substance, you can use the equation:

Q = m * ΔT * c

Where:
Q is the amount of heat (in joules),
m is the mass of the substance (in kilograms),
ΔT is the change in temperature (in degrees Celsius),
c is the specific heat capacity of the substance (in joules per kilogram per degree Celsius).

In this case, the mass of the aluminum is given as 100 grams, which we need to convert to kilograms by dividing by 1000:
m = 100 grams / 1000 = 0.1 kg

The change in temperature is given as 80°C - 50°C = 30°C.

The specific heat capacity of aluminum is given as 900 J/kg°C.

Now, we can substitute these values into the equation:

Q = 0.1 kg * 30°C * 900 J/kg°C

Calculating this expression:
Q = 2700 J

So, the correct answer is 2700 Joules. Therefore, your second calculation of 100 * 30 * 0.9 J is the correct equation.