what is the approximate increase in thermal energy in joules when the temperature of 15 grams of water is raised from 20° to 35° C. the specific heat of water is 4.19 j/g degrees Celsius​

942.75J

Explanation:

Change in thermal energy is equal to the mass of the given substance times the specific heat capacity times the temperature change.

We've already been given the specific heat capacity, the mass as well as the initial and final temperatures.

So change in temperature will be 35° - 20° = 15°

Thermal energy change = 15 × 15 × 4.19

The final answer is 942.75J

Hope that helped.