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Thermochemistry Equations & Formulas Video Lecture | Chemistry for EmSAT Achieve

FAQs on Thermochemistry Equations & Formulas Video Lecture - Chemistry for EmSAT Achieve

1. What is the definition of thermochemistry?

Ans. Thermochemistry is the branch of chemistry that deals with the study of the energy changes that occur during chemical reactions and changes in state.

2. How is the enthalpy change calculated in thermochemistry equations?

Ans. The enthalpy change (ΔH) in a chemical reaction is calculated by taking the difference between the sum of the enthalpies of the products and the sum of the enthalpies of the reactants.

3. What is the relationship between heat and temperature in thermochemistry?

Ans. Heat is the energy transferred between objects due to a temperature difference, while temperature is a measure of the average kinetic energy of the particles in a substance. In thermochemistry, heat is often measured in Joules or Calories.

4. How can Hess's Law be applied in thermochemistry calculations?

Ans. Hess's Law states that the total enthalpy change for a reaction is the same regardless of the number of steps taken to achieve the final reaction. This principle allows us to calculate the overall enthalpy change by summing the enthalpy changes of individual steps.

5. What are some common units used in thermochemistry calculations?

Ans. Common units used in thermochemistry calculations include Joules (J) for energy, grams (g) for mass, moles (mol) for amount of substance, and Kelvin (K) for temperature. It is important to ensure that all units are consistent when performing calculations.

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Sep 21, 2025 Last updated

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