Dear beloved readers, welcome to our website! We hope your visit here brings you valuable insights and meaningful inspiration. Thank you for taking the time to stop by and explore the content we've prepared for you.
------------------------------------------------ **THERMAL ENERGY**

Thermal energy is heat energy. In equation form, heat energy is represented as [tex]Q[/tex]. The unit for thermal energy is Joules (J). You can determine how much heat energy is lost or gained when the temperature of a substance changes.

The equation to solve for change in thermal energy is [tex]\Delta Q = Cm\Delta T[/tex].

- [tex]Q[/tex] = Thermal energy (J)
- [tex]C[/tex] = Specific heat of the object ([tex]J/(g \cdot °C)[/tex])
- [tex]m[/tex] = Mass (g)
- [tex]\Delta T[/tex] = Change in temperature (°C)

**Solve for change in thermal energy ([tex]Q[/tex]):**

1. A 10.0 g piece of copper wire, sitting in the sun, reaches a temperature of 80.0ºC. How many Joules are released when the copper cools to 40.0ºC? The specific heat capacity of copper is 0.377 [tex]J/(g \cdot °C)[/tex].

- [tex]Q = ?[/tex]
- [tex]C = 0.377 \, J/(g \cdot °C)[/tex]
- [tex]m = 10.0 \, g[/tex]
- [tex]\Delta T = 80.0ºC - 40.0ºC[/tex]

2. The specific heat capacity of water is 4.184 [tex]J/(g \cdot °C)[/tex]. How much thermal energy is required to change the temperature of 700.0 g of water from 25.6ºC to 75.4ºC?

3. How much thermal energy is released when a 201 g piece of blown glass at an initial temperature of 150ºC is cooled to 25ºC? The specific heat capacity of glass is 0.837 [tex]J/(g \cdot °C)[/tex].

4. How much heat must be absorbed by a 500 g pot of water in order to raise the temperature of the water from 20°C to 30°C? (Specific heat capacity of water is 4.184 [tex]J/(g \cdot °C)[/tex]).

5. An element has a specific heat of 0.18 [tex]J/(g \cdot °C)[/tex]. If 10 g of this element are heated and release 345 J of energy, what would be the resulting change in temperature?