Question

0.32 g of a walnut is burned under an aluminum can filled with 58.1 mL of water. The water temperature in the can increases by 3.1 °C. How many calories did the walnut release?

Answer 1

The walnut released approximately 180.11 calories.

Step-by-step explanation:

To calculate the number of calories released by the walnut, we can use the heat transferred equation:

Q = mcΔT

Where:

• Q is the heat transferred in calories
• m is the mass of water in grams
• c is the specific heat capacity of water (1 cal/g°C)
• ΔT is the change in temperature in degrees Celsius

Given that the water temperature increases by 3.1 °C and the mass of water is 58.1 g (which is equivalent to 58.1 mL), we can plug these values into the equation:

Q = (58.1 g)(1 cal/g°C)(3.1 °C) = 180.11 calories

Therefore, the walnut released approximately 180.11 calories.