1. What is the Energy Released Equation?

The energy released equation (Q = m × c × ΔT) calculates the amount of thermal energy transferred during a temperature change. It's a fundamental concept in thermodynamics and calorimetry, commonly used in IGCSE Chemistry.

2. How Does the Calculator Work?

The calculator uses the energy released equation:

Where:

• \( Q \) — Energy released (Joules)
• \( m \) — Mass of substance (grams)
• \( c \) — Specific heat capacity (J/g°C)
• \( \Delta T \) — Temperature change (°C)

Explanation: The equation calculates the thermal energy absorbed or released when a substance undergoes a temperature change, based on its mass and specific heat capacity.

3. Importance of Energy Calculation

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

4. Using the Calculator

Tips: Enter mass in grams, specific heat capacity in J/g°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 energy required to raise the temperature of 1 gram of a substance by 1°C.

Q2: What are typical specific heat values?
A: Water has a specific heat of 4.18 J/g°C. Metals typically have lower values (e.g., iron: 0.45 J/g°C).

Q3: When is this equation used?
A: This equation is used in calorimetry experiments, thermal analysis, and energy balance calculations in chemical processes.

Q4: What does negative ΔT indicate?
A: A negative temperature change indicates energy is being released (exothermic process), while positive indicates energy absorption (endothermic).

Q5: Are there limitations to this equation?
A: This equation assumes constant specific heat capacity and no phase changes during the temperature change.