Question

A researcher studying the nutritional value of a new candy places a 4.70 g sample of the candy inside a bomb calorimeter and combusts it in excess oxygen. The observed temperature increase is 2.40 °C. If the heat capacity of the calorimeter is 39.40 kJ-K-¹, how many nutritional Calories are there per gram of the candy?

Answer 1

Bomb calorimetry is used to measure the energy content of a substance by burning it and measuring the heat produced. To calculate the number of nutritional Calories per gram of the candy, we need to use the formula: Calories per gram = q / (mass of candy * temperature increase).

Step-by-step explanation:

This is a question about bomb calorimetry, a technique used to measure the energy content of a substance by burning it and measuring the heat produced. In this case, the researcher is studying the nutritional value of a candy. By placing a 4.70 g sample of the candy in a bomb calorimeter and combusting it, the observed temperature increase is 2.40 °C. The heat capacity of the calorimeter is given as 39.40 kJ-K⁻¹.

To calculate the number of nutritional Calories per gram of the candy, we need to use the formula:

Calories per gram = q / (mass of candy * temperature increase)

where q is the heat transferred to the calorimeter and its contents.