In which of the following heat energy will be released?
Answer: (3) Burning of L.P.G.
Fuels release heat on burning. Heat of combustion is total amount of heat released when a fuel is burnt when there is complete combustion with oxygen. It is a chemical reaction in which hydrocarbon is burnt, and it produces carbon dioxide, heat and water.
In which case the energy released is minimum?
Answer: The energy released when an electron is added to a neutral atom is called an electron affinity. The minimum energy will release in case of B → B–. an increase in atomic size increases, electron affinity decreases as the incoming electron gets added further away from the nucleus.
In which of the following cases heat energy is given out?
Conversion of water vapour to water heat energy is given out. Liquid to solid – This is called freezing. On decreasing temperature, the particles of liquid lose kinetic energy and move very slowly and come closer to each other than before.
Why is this method called indirect calorimetry?
Indirect calorimetry calculates heat that living organisms produce by measuring either their production of carbon dioxide and nitrogen waste (frequently ammonia in aquatic organisms, or urea in terrestrial ones), or from their consumption of oxygen.
What is steady state indirect calorimetry?
Abstract. Achievement of steady state during indirect calorimetry measurements of resting energy expenditure (REE) is necessary to reduce error and ensure accuracy in the measurement. Steady state is often defined as 5 consecutive min (5-min SS) during which oxygen consumption and carbon dioxide production vary by ±10% …
How do you calculate REE from indirect calorimetry?
Weir equation used to calculate energy expenditure: Energy expenditure = (3.9VO2 – 1.1VCO2) – 2.17 (urinary nitrogen) Abbreviated Weir Equation = used to calculate REE: REE = (3.94 x VO2) + (1.1 x VCO2)
What is a metabolic cart?
Metabolic Carts – A metabolic cart is used to precisely measure the oxygen you inhale and the carbon dioxide you exhale during rest, after meals, and during certain exercises. … The concentrations of the isotopes are measured over time by sampling saliva, urine, or blood.
Investigating The Energy Content Of Food | Biology Practicals
Energy Content of Food
Measuring Energy Expenditure of the Body – Direct and Indirect Calorimetry and Oxygen Consumption
Measuring the energy in food
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