# What is a calorific value of a fuel?

The calorific value of a fuel is the quantity of heat produced by its combustion at constant pressure and under normal (standard) conditions (i.e. to 0oC and under a pressure of 1,013 mbar).

## What is calorific value unit?

The unit of calorific value is KJ/kg (kilojoule per kilogram). The efficiency of fuel of food is dependent on the calorific value; higher the value, higher the efficiency, and similarly lower the calorific value, lower is the efficiency.

## What is calorific value answer?

Calorific value is the amount of heat energy present in food or fuel and which is determined by the complete combustion of specified quantity at constant pressure and in normal conditions. It is also called calorific power. The unit of calorific value is kilojoule per kilogram i.e. KJ/Kg.

## How is calorific value calculated?

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 % + x % volatile matter kJ/kg.

## What is calorific value used for?

Calorific value (CV) is a measure of heating power and is dependent upon the composition of the gas. The CV refers to the amount of energy released when a known volume of gas is completely combusted under specified conditions.

## Which has highest calorific value?

hydrogen Complete step-by-step answer: Calorific value is nothing but the energy contained in a fuel or food, determined by measuring the heat produced by the complete combustion of a specified quantity of it. This is now usually expressed in joules per kilogram. Hence, hydrogen has the highest calorific value.

## What is the calorific value of PNG?

PNG Composition Its calorific value generally ranges from 8000 kcal/m3 to 9000 kcal/m3, Natural Gas has the lowest carbon to hydrogen ratio, and hence it burns completely, making it a more environment friendly fuel.

## What is the calorific value of hydrogen in KJ kg?

1,50,000 kj / kg Calorific value of Hydrogen is 1,50,000 kj / kg.

## What is bomb in bomb calorimeter?

A bomb calorimeter is a type of constant-volume calorimeter used in measuring the heat of combustion of a particular reaction. … The bomb, with the known mass of the sample and oxygen, form a closed system no gases escape during the reaction.

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## What is calorific value give example?

Example. Calorific Value of Petrol is 45000 KJ/Kg. It means if 1 Kg of Petrol is completely combusted,it will produce 45000 Kilojoules of heat energy.

## What do you mean by calorific value Class 8?

Calorific value refers to the quantity of heat produced by complete combustion of a unit volume of a substance. The amount of heat energy present in food or fuel is measured by full combustion of a specific quantity at constant pressure and under normal circumstances.

## How do you calculate calorific value of glucose?

H = – 2900kj/mol

1. or heat evolved from 180g glucose = 2900kJ.
2. Calorific value =

## How do you convert GCV to NCV?

Calculate a) Gross calorific value, moist basis b) Net calorific value, dry basis c) Net calorific value, moist basis d) Gross calorific value, dry basis using Dulong formula. = 32060.2 KJ/Kg NCV = GCV 24.44(9%H + %M) = 30630.26 KJ/Kg Thus NCV = 0.955 times GCV in this case. 3. Note: Change in basis increases CV.

## What is LCV and HCV?

A LCV is defined in the Motor Vehicles Act as a vehicle with GVW of not more than 6 ton. A HCV is defined as vehicle with GVW of more than 6 ton. Gross vehicle weight is defined as vehicle weight plus rated payload. Rated payload is the maximum weight permitted to be loaded on the vehicle under Motor Vehicle Act.

## What is the CV of natural gas?

Net Calorific Value & Gross Calorific Value

Solid Gross calorific value (MJ/kg) Net calorific value (MJ/kg)
Methane 55.4 50.0
Natural gas L 42.4 38.3
Natural gas H 52.3 47.3
Hydrogen 142 120

## What octane number means?

octane number, also called Antiknock Rating, measure of the ability of a fuel to resist knocking when ignited in a mixture with air in the cylinder of an internal-combustion engine.

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## What is calorific value in chemistry?

The calorific value is the total energy released as heat when a substance undergoes complete combustion with oxygen under standard conditions. The chemical reaction is typically a hydrocarbon or other organic molecule reacting with oxygen to form carbon dioxide and water and release heat.

## Which has lowest calorific value?

Coal has the lowest calorific value.

## Which fuel has the least calorific value?

Of the three major fossil fuels coal has the highest carbon-to-hydrogen ratio and the lowest calorific value.

## What is high and low calorific value?

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.

## Is Gail gas cheaper than cylinder?

On the domestic consumption front, GAIL Gas Ltd claims that CNG works out to be cheaper than LPG. If the price of one LPG cylinder (subsidised) is Rs 430, the cost of PNG for 15 SCMD as proposed by GAIL is Rs 330. 15 SCMD is equivalent to one cylinder.

## What is calorific value of diesel?

roughly 45.5 MJ/kg The calorific value of diesel fuel is roughly 45.5 MJ/kg (megajoules per kilogram), slightly lower than petrol which is 45.8 MJ/kg. However, diesel fuel is denser than petrol and contains about 15% more energy by volume (roughly 36.9 MJ/litre compared to 33.7 MJ/litre).

## Is PNG cheaper than cylinder?

How much does it cost? PNG is much cheaper than LPG. While a 14.2-kg subsidised domestic LPG cylinder costs 538, the same quantity of PNG, which is calculated based on standard cubic metres (SCM), comes at a price of Rs 375, GAIL officials said. … The retail selling price of one SCM (natural gas) is 22.10.

## What do you understand by the calorific value of a fuel is 150000 kJ kg?

Hydrogen The calorific value of a fuel is expressed in a unit called kilojoule per kg (kJ/kg). … Calorific Values of Different Fuels.

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Fuel Calorific Value (kJ/kg)
CNG 50000
LPG 55000
Biogas 35000-40000
Hydrogen 150000

## What is calorific value of water?

4.186 joule. The specific heat of water is 1 calorie/gram C = 4.186 joule/gram C which is higher than any other common substance.

## What is net calorific value?

The heat produced by combustion of unit quantity of a solid or liquid fuel when burned, at a constant pressure of 1 atm (0.1 MPa), under conditions such that all the water in the products remains in the form of vapor.

## What is 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 subtracting the heat of vaporization of the water vapour from the higher heating value.

## What is coffee cup calorimetry?

A coffee cup calorimeter is used to measure enthalpy changes in chemical processes, giving H. Essentially, the heat measured in the device is equivalent to H, the change in enthalpy.

## How do you calculate Q in bomb calorimeter?

In this technique, a sample is burned under constant volume in a device called a bomb calorimeter. The amount of heat released in the reaction can be calculated using the equation q = -CT, where C is the heat capacity of the calorimeter and T is the temperature change.