Final answer:
The heat required to raise the temperature of 4g of a substance with a specific heat capacity of 2.01 J/g°C from 20°C to 30°C is calculated as q = mcΔT, which results in 80.4 Joules.
Step-by-step explanation:
To find the amount of heat needed to raise the temperature of a substance, we can use the formula q = mcΔT, where q is the heat energy, m is the mass, c is the specific heat capacity, and ΔT is the temperature change. For a substance with a mass of 4g, a specific heat capacity of 2.01 J/g°C, and a temperature change from 20°C to 30°C, the calculation would be as follows:
q = (4 g)(2.01 J/g°C)(30°C - 20°C)
q = (4 g)(2.01 J/g°C)(10°C)
q = 80.4 J
So, the heat needed to raise the temperature of 4g of the substance by 10°C is 80.4 Joules.