Question

How many kJ of energy can be released by a banana containing 150 calories?

Answer 1

1) The energy is 630 kJ option D

2) Option B is true

3) The heat that is required is 220 kJ. Option C

Endothermic reactions absorb heat, causing a decrease in temperature, while exothermic reactions release heat, causing an increase in temperature. The reaction releases energy, often in the form of heat, making the surroundings feel warmer.

1) We have that;

1 Cal = 4.184 kJ

150 cal = 150 cal * 4.184 kJ/ 1 cal

= 630 kJ

3) If 1 mole requires 62.4 kJ

3.5 mole requires 3.5 moles * 62.4 kJ/ 1 mole

= 220 kJ

Answer 2

Step 1

1 calorie or cal = 4.184 J

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Step 2

Procedure:

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150 cal x (4.184 J/1 cal) = 627.6 J

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Step 3

1 kJ = 1000 J

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Step 4

627.6 J x (1 kJ/1000 J) = 0.6276 kJ

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Answer: according to all options

None of these