[Campbell Biology P.95] According to the text, which statement correctly compares the energ... | Practice Question

According to the text, which statement correctly compares the energy units calorie cal and joule J ?

  • A: One joule (J) is the amount of heat to raise 1g of water by 1°C, while a calorie (cal) is equivalent to 0.239 joules.
  • B: A kilocalorie (kcal) is 1,000 calories, and 'Calories' on food packages are actually kilocalories.
  • C: One calorie (cal) equals 4.184 joules (J), and one joule equals 0.239 calories.
  • D: Both B and C are correct.

Explanation

The text states: 'A kilocalorie kcal , 1,000 cal, is the quantity of heat required to raise the temperature of 1 kilogram kg of water by 1°C. The "Calories" on food packages are actually kilocalories. ' And: 'One joule equals 0.239 cal; one calorie equals 4.184 J.' Therefore, both statements B and C are correct based on the provided information.