Final answer:
A serving of 30 grams of almonds containing 190 Calories can raise the temperature of 190 grams of water by 30 degrees Celsius, as 1 food Calorie is sufficient to raise the temperature of 1 kilogram of water by 1 degree Celsius.
Step-by-step explanation:
A serving of 30 grams of almonds contains 190 Calories. To find out the amount of water this energy can heat, we need to understand the relationship between calories and temperature change. In chemistry and biochemistry, one calorie (with a lowercase c) is defined as the amount of energy needed to raise the temperature of one gram of water by one degree Celsius. When discussing food Calorie content (noted with an uppercase C), we are referring to kilocalories. So, one food Calorie is equivalent to raising the temperature of one kilogram (1000 grams) of water by one degree Celsius.
Given that 190 food Calories (or kilocalories) are in 30 grams of almonds, we can calculate the energy transfer to water. The option that correctly represents the amount of energy provided by 190 food Calories is option A: 190 grams of water can be heated by 30 degrees Celsius, because:
1 food Calorie (Cal) = 1 kilocalorie (kcal) = 1,000 small calories (cal)
190 food Calories = 190 kcal = 190,000 small calories (cal)
To raise 190 grams of water by 1 degree Celsius, 190 small calories are needed (since 1 gram × 1°C = 1 cal). Therefore, 190,000 small calories that are in 190 food Calories can raise 190 grams of water by 30 degrees Celsius (since 190 cal/g°C × 30°C = 190,000 cal).