How many joules of heat energy are released when 50.0g of water are cooled from 70.0c to 60.0c

2090 Joules

Explanation:

Heat energy is calculated by multiplying the mass of a substance by its specific heat capacity and by change in temperature.

That is;

Quantity of heat = Mass × specific heat capacity × change in temperature

Q = m×c × ΔT

In this case; we need to calculate the heat energy released by water

Mass of water = 50.0 g

Specific heat capacity of water = 4.18 J/g°C

Change in temperature = 10 °C ( 70°C - 60°C)

therefore;

Heat released = 50 g × 4.18 J/g°C × 10 °C

                       = 2090 Joules

Thus, the heat energy released when 50 g of water is cooled from 70°C to 60°C is 2090 Joules

plants need sunlight, water, and carbon dioxide to make food. plants use the raw materials of water, nutrients they absorb from soil, and carbon dioxide to make sugars the plant can use. energy from the sun and chlorophyll are also needed.