determine the energy needed to raise the temperature of 10 grams of H2O from 25 degrees C to 75 degrees C?
q = mass x specific heat x (Tfinal-Tinitial)
To determine the energy needed to raise the temperature of a substance, you can use the specific heat capacity formula. The specific heat capacity of water is 4.18 J/g°C. The formula to calculate the energy is as follows:
Q = m * c * ΔT
Where:
Q = energy needed (in joules)
m = mass of the substance (in grams)
c = specific heat capacity of the substance (in J/g°C)
ΔT = temperature change (final temperature - initial temperature)
Let's substitute the values into the formula:
m = 10 grams
c = 4.18 J/g°C
ΔT = (75°C - 25°C) = 50°C
Q = 10 grams * 4.18 J/g°C * 50°C
Now, let's calculate:
Q = 2090 Joules
Therefore, the energy needed to raise the temperature of 10 grams of water from 25°C to 75°C is 2090 Joules.