To calculate the amount of heat required to raise the temperature of a substance, you can use the specific heat capacity formula. The specific heat capacity of water is approximately 4.18 J/g°C. Here's how you can calculate the heat needed:
Determine the temperature change: ΔT = final temperature - initial temperature ΔT = 120°C - (-10°C) = 130°C
Calculate the heat using the formula: Q = m * c * ΔT where: Q is the heat (in Joules), m is the mass of the substance (in grams), c is the specific heat capacity (in J/g°C), ΔT is the temperature change (in °C).
Q = 200 g * 4.18 J/g°C * 130°C Q = 108,680 J
Therefore, approximately 108,680 Joules (or 108.68 kJ) of heat is needed to raise the temperature of 200 grams of water from -10°C to 120°C.