Final answer:
The amount of energy required to change the temperature of 5.00 g of water from 21.3 °C to 35.6 °C is 298.86 J.
Step-by-step explanation:
The specific heat of water is 4.184 J/g °C, so to heat 1 g of water by 1 °C requires 4.184 J.
Since we have 5.00 g of water, we can calculate the energy required to heat it from 21.3 °C to 35.6 °C.
The temperature change is 35.6 °C - 21.3 °C = 14.3 °C.
Therefore, the energy needed is:
E = (4.184 J/g °C) × (5.00 g) × (14.3 °C) = 298.86 J