100 mL of water is already in the calorimeter. Use the density of water at 25°C (0.997 g/mL) to determine the mass from the volume and record it below. Make certain the stirrer is On (you should be able to see the shaft rotating).
Mass water:
Mass ice:
The correct answer and explanation is:
To determine the mass of water in the calorimeter, use the formula: mass=density×volume\text{mass} = \text{density} \times \text{volume}
Given:
- Volume of water = 100 mL
- Density of water at 25°C = 0.997 g/mL
Substituting the values: mass water=0.997 g/mL×100 mL=99.7 g\text{mass water} = 0.997 \, \text{g/mL} \times 100 \, \text{mL} = 99.7 \, \text{g}
Thus, the mass of the water in the calorimeter is 99.7 grams.
Now, for the mass of the ice, you would typically use a balance to measure its mass directly. If the volume or other specific details were provided, like the ice’s volume or density at a specific temperature, a calculation could be made. However, in this case, the mass of the ice is not directly given, and measurement would be necessary for an accurate value.
Explanation:
The mass of water is derived from its volume and the given density. The density of water at 25°C is 0.997 g/mL, meaning for each milliliter of water, the mass is 0.997 grams. By multiplying the volume (100 mL) by this density, we obtain the total mass of water in the calorimeter, which is 99.7 grams.
When measuring ice, the process would be similar if the volume or the density of the ice were known, but it typically requires physical measurement for precise calculation. In a typical lab setting, you would weigh the ice on a balance to get its exact mass.