Passage IV
A bomb calorimeter is used to determine the amount of heat released when a substance is burned in oxygen (Figure 1). The heat, measured in kilojoules (kJ), is calculated from the change in temperature of the water in the bomb calorimeter. Table 1 shows the amounts of heat released when different foods were burned in a bomb calorimeter. Table 2 shows the amounts of heat released when different amounts of sucrose (table sugar) were burned. Table 3 shows the amounts of heat released when various chemical compounds were burned.
24. Based on the information in Tables 1 and 2, the heat released from the burning of 5.0 g of potato in a bomb calorimeter would be closest to which of the following?
Your Answer is
Correct Answer is H
Explanation
Calculation questions. According to table 1, 1 g of potato returns 3.2 kJ of heat to Shifang, then 5 g will release 5×3.2=16 kJ of heat, and option H is closest to 15 kJ