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Heat of itself does not spoil food. What spoil the food is the growth of bacteria in the food.
At low temperatures (in a fridge) these bacteria only grow slowly but when the food warms up to room temperature the bacteria grow faster and the food will spoil. The reason for this is that for every 10oC rise in temperature the rate of chemical reactions (ie the metabolic rate of the bacteria) doubles. Obviously above a certain temperature (boiling point) the heat is so much that the bacteria are killed off.
Wiki User
∙ 14y ago
Wiki User
∙ 14y agoActually, heat is not used to preserve food, but rather to kill unwanted microorganisms (germs) prior to preservation. In terms of temperature, cold is used to preserve foods by slowing down both the growth rates of the remaining microorganisms and the natural process of decay.
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Why are the containers used to cook foods usually made of metals?
Heat is very important when cooking. Containers used to cook food are usually made of metals because metal is a good conductor of heat.
Why is heat or thermal energy released from the chemical energy to food?
Oxidation releases heat. Food is chemically oxidized by the body to produce carbon dioxide, water and heat. There are other chemical processes occurring but this is the primary source of heat from food.
What happens to the heat when you take in hot food?
The heat in the food is absorbed and the burning sensation in your stomach quickly lessens. Which is a reminder not to eat food that is too hot!
Why is heat used?
The heat is very important in our daily life in warming the house, cooking, heating the water and drying the washed clothes. The heat has many usages in the industry as making and processing the food and manufacture of the glass, the paper, the textile and etc.
What is a bomb calorimeter used for?
A calorimeter is a device used to measure the heat levels produced by chemical reactions. Bomb calorimeters are heavy-duty devices to withstand greater levels of heat combustion and pressure. Bomb calorimeters are used in many industries such as the oil and gas industry or food industry.
What are the 6 main ways to preseve food?
FreezingCanningDryingSmokingSaltingSealing
Why do you need to preseve food in the wilderness?
To ensure that you have enough food to feed you throughout your stay there.
How can the addition of salt preseve food?
Salt absorb water and as a consequence destroy microorganisms.
What are the jobs of e numbers?
they are things that make the food taste nice and preseve the flavour
How do you preseve food?
food are contaminated by microb and cause spoilage for prevantion of food we r taking some mathod like pasturization mathod, freezing ,boiling ,filtration ,chemical mathod etc.
Two reasons why the process of canning food kills microbes?
Because of the heat used to can the food.
Explain why heat is used to preserve food?
Heat alone is not enough to preserve food unless it is used to dehydrate. Heat kills bacteria and pests and their eggs that may be in food and that assists in the preservation of food. In addition to heat food needs to be cured, smoked, canned, fermented, or frozen to preserve it for an extended period of time.
What is gas and why is it used so much?
Gas that is burned, creates heat. Heat is used to cook food.
Which energy is used for heating of food and why?
Heat energy is used for food cooking. It work as temperature changes.
How was heat used in the past?
Heat was use to cook food, maintain your temperature, and sometimes used as a light source.
How can heat be used in today's life?
Heat is used to cook our food, to warm our houses, and to keep us alive in the freezing winters.
What is a pan stand used for?
It is used to heat food and water by using conduction and also to hold the food/water easily.
