To calculate the heat required to raise the temperature of a substance, you can use the specific heat capacity formula:
Q = m * c * ΔT
where: Q is the heat required (in joules), m is the mass of the substance (in grams), c is the specific heat capacity of the substance (in J/g°C), and ΔT is the change in temperature (in °C).
For water, the specific heat capacity is approximately 4.18 J/g°C.
First, we need to calculate the change in temperature: ΔT = final temperature - initial temperature ΔT = 120°C - (-20°C) ΔT = 140°C
Now we can substitute the values into the formula: Q = 10 g * 4.18 J/g°C * 140°C Q = 5812 joules
Therefore, the heat required to raise the temperature of 10 grams of water from -20°C to 120°C is approximately 5812 joules.