1. What is the Heat Equation?

The heat equation (q = m × c × ΔT) calculates the amount of heat energy absorbed or released by a substance during a temperature change. It's a fundamental equation in thermodynamics and chemistry.

2. How Does the Calculator Work?

The calculator uses the heat equation:

Where:

• \( q \) — Heat energy (Joules)
• \( m \) — Mass of the substance (kg)
• \( c \) — Specific heat capacity (J/kg·°C)
• \( \Delta T \) — Temperature change (°C)

Explanation: The equation calculates the thermal energy transfer based on the mass of the substance, its specific heat capacity, and the temperature difference.

3. Importance of Heat Calculation

Details: Accurate heat calculation is crucial for understanding energy transfer in chemical reactions, designing heating/cooling systems, and various industrial processes.

4. Using the Calculator

Tips: Enter mass in kg, specific heat capacity in J/kg·°C, and temperature change in °C. All values must be valid (mass > 0, specific heat > 0).

5. Frequently Asked Questions (FAQ)

Q1: What is specific heat capacity?
A: Specific heat capacity is the amount of heat energy required to raise the temperature of 1 kg of a substance by 1°C.

Q2: Why is heat measured in Joules?
A: Joule is the SI unit of energy, and heat is a form of energy transfer, so it's measured in Joules.

Q3: Can this equation be used for phase changes?
A: No, this equation only applies when there's a temperature change. For phase changes, use q = m × L (where L is latent heat).

Q4: What are typical specific heat values?
A: Water has a high specific heat of 4184 J/kg·°C, while metals like iron have lower values around 449 J/kg·°C.

Q5: Does the equation work for cooling as well as heating?
A: Yes, a negative ΔT indicates heat loss (cooling), resulting in a negative q value representing heat released.