Final answer:
The correct option is: A 840 J. The approximate increase in thermal energy when raising the temperature of 10 g of water from 15°C to 35°C is approximately 840 J. where q is the energy, m is the mass of the water, c is the specific heat of water, and ΔT is the change in temperature.
Step-by-step explanation:
The approximate increase in thermal energy when the temperature of 10 g of water is raised from 15°C to 35°C can be calculated using the equation:
q = m * c * ΔT
where q is the energy, m is the mass of the water, c is the specific heat of water, and ΔT is the change in temperature.
Plugging in the values:
q = 10 g * 4.18 J/g°C * (35°C - 15°C)
q ≈ 10 g * 4.18 J/g°C * 20°C
q ≈ 836 J ≈ 840 J
Therefore, the approximate increase in thermal energy is 840 J (option A).