## Can we measure heat energy directly using calorimetry?

Measuring Heat Flow One technique we can use to measure the amount of heat involved in a chemical or physical process is known as calorimetry. Calorimetry is used to measure amounts of heat transferred to or from a substance. To do so, the heat is exchanged with a calibrated object (calorimeter).

## How do you calculate calorific value?

Goutel suggested the following formula from calculating the higher calorific value when the percentage proximate analysis of fuel is known. The formula is, cal. value = 343.3 x fixed carbon % + α x % volatile matter kJ/kg. Goutel formula is unreliable for fuels having high percentage in oxygen.

## What is difference between GCV and NCV?

Gross calorific value (GCV) is the amount of heat released by the complete combustion of a unit of natural gas. Net Calorific Value (NCV) also known as lower heating value (LHV) or lower calorific value (LCV) is determined by the subtracting the heat of vaporization of the water vapour from the higher heating value.

## How do you calculate LCV and HCV?

1. If the percentage (%) of Hydrogen (H) is given.
2. LCV = [ HCV – 9H/100 x 587] kcal/kg.
3. = [HCV – 0.09 H x 587] kcal/kg.

## What is HCV and LCV of fuel?

HCV (higher calorific value) and LCV (lower calorific value) are two measurements of heat liberated from the combustion of a unit mass of fuel. Also, HCV is also known as the gross calorific value while LCV is known as the net calorific value.

## Why is HCV higher than LCV?

The higher calorific value or Gross calorific value (GCV) which supposes that the water of combustion is entirely condensed. The heat contained in this water is recovered. Answer: The higher calorific value or Gross calorific value (GCV) which supposes that the water of combustion is entirely condensed.

## What are the characteristics of a good source of energy?

The characteristics of ideal or good source of energy are:

• It should produce a large amount of energy per unit.
• It must be economical and pollution-free.
• It must be able to produce over a long period of time.
• It must be easy to handle or carry and store.
• It should be of low cost but high calorific value.

## What is the main characteristic of energy?

Energy: The ability to produce a change in matter or to do work. Work is defined as a force moving through a distance (e.g., pushing a rock off a cliff). Kinetic Energy: The energy an object has while it is in motion.

## What is a good source of energy and what is a good fuel?

Ans: Natural gas can be used for heating and cooking food as it is a clean source of energy. It has high calorific value also It does not produce a large amount of smoke on burning. It is easy to use and easy to transport.

## What are the 4 properties of energy?

All matter and objects contain a certain amount of energy, which varies according to their properties (position, mass, shape, speed, etc.)