To increase the temperature of 15g of water from 10°C to 30°C, 1254 Joules of heat energy is required, calculated using the specific heat capacity equation Q = mcΔT with the specific heat of water being 4.18 J/g°C.
To calculate the amount of heat required to increase the temperature of 15g of water from 10°C to 30°C, you can use the specific heat capacity equation:
Q = mcΔT
where Q is the heat energy (in Joules), m is the mass of the water (in grams), c is the specific heat capacity (J/g°C), and ΔT is the temperature change (in °C).
Substituting the given values:
• m = 15g (mass of water)
• c = 4.18 J/g°C (specific heat capacity of water)
• ΔT = 30°C - 10°C = 20°C (temperature change)
Q = 15g × 4.18 J/g°C × 20°C = 1254 J
Therefore, 1254 joules of heat energy is required to raise the temperature of 15g of water from 10°C to 30°C.