at room temperature, all samples of liquid water must have the same...

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Density

At room temperature, all samples of liquid water must have the same property, which is the boiling point. The boiling point of water at standard atmospheric pressure (1 atmosphere) is 100 degrees Celsius or 212 degrees Fahrenheit. This means that regardless of the volume or quantity of water, if it is at room temperature, it will start boiling and converting into vapor once it reaches this temperature.

Now, if you are wondering how to determine the boiling point of water, there are a few ways to do it. The most common and convenient method is by using a thermometer. Here's a step-by-step guide on how to measure the boiling point of water:

1. Pour a sufficient amount of water into a clean and dry container. Make sure the container is suitable for heating, such as a beaker or pot.

2. Insert the thermometer vertically into the water, ensuring that the tip of the thermometer is fully immersed but not touching the sides or bottom of the container.

3. Place the container on a heat source, like a stove or a hot plate, and gradually increase the temperature. Make sure to monitor the thermometer closely.

4. As the water heats up, you will notice the temperature on the thermometer rising. Continue heating until you observe a constant temperature for a few seconds. This constant temperature is the boiling point of water at your current atmospheric pressure.

Remember that the boiling point of water can vary slightly depending on factors such as altitude and atmospheric pressure. However, at standard atmospheric pressure, the boiling point of water is 100 degrees Celsius or 212 degrees Fahrenheit.