Answered

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how much energy is needed to heat 2kg of cooking oil with a specific heat capacity of 2000j/kg°c from 20°c to 120°c​

Sagot :

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Answer:

400kj

Explanation:

h =mass × specific heat capacity × change in temperature

= 2×2000×[120-20]

=2×2000×100

=400000j

=400kj

400kj of energy is needed.

Energy:

  • Energy, which is observable in the execution of labor as well as in the form of heat and light, is the quantitative quality that is transferred to a body or to a physical system in physics.
  • Energy can be transformed in form but cannot be created or destroyed, according to the rule of conservation of energy.
  • The joule, which is the energy supplied to an object by the labor of moving it a distance of one meter against a force of one newton, is the unit of measurement for energy in the International System of Units (SI).

Cooking oil:

  • Cooking oil is a liquid fat made of plants, animals, or synthetic materials that are used in baking, frying, and other cooking processes.
  • It may also be referred to as edible oil because it is used in cold food preparation and flavoring, including salad dressings and bread dips.
  • At room temperature, cooking oil is normally a liquid, although some saturated-fat oils, such as coconut oil, palm oil, and palm kernel oil, are solids.

Solution -

Formula - h = mass × specific heat capacity × change in temperature

So,

[tex]2[/tex] × [tex]2000[/tex] × [tex][120-20][/tex]

[tex]2[/tex] × [tex]2000[/tex] × [tex]100[/tex]

[tex]=400000j\\=400kj[/tex]

Therefore, 400kj of energy is needed.

Know more about energy here:

https://brainly.com/question/13881533

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