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This article was co-written by Meredith Juncker, PhD. Meredith Juncker is a PhD student in Biochemistry and Molecular Biology at Louisiana State University’s Center for Health Sciences. Her studies focus on proteins and neurodegenerative diseases.
This article has been viewed 3,176 times.
What do you do when you need to determine the temperature of the water but don’t have a waterproof thermometer available? This article will help you estimate the temperature of water by watching for signs that the water is about to boil or freeze. In addition, you will be taught how to use your hand or elbow to guess the temperature of the water. However, determining the temperature of the water without using a thermometer will not give you the exact temperature.
Steps
Using hands and elbows
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Place your hand near the water. If you want to guess whether the water is cold, warm or hot, first place your hand above the water. If you feel heat radiating from the water, it is hot and could cause you to burn. If you can’t feel the heat, it’s possible the water is at room temperature or cold.
- Do not directly put your hands into the water whether in the kitchen or in the wild without placing your hands above the water to feel the temperature.
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Dip your elbow in the water. Just dip one elbow in the water if you can. This is how to estimate the temperature of the water. You will quickly know if it is hot or cold water.
- Avoid putting your hands in water where the temperature is unknown, as you may get burned.
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Guess the temperature of the water. After placing the elbow in the water for about 5-10 seconds, you can guess the temperature of the water. If the water feels warm but not hot, it’s probably around 38°C. [1] X Research Source
Determination of cold water
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Notice the condensation on the water container. If the water is contained in a glass or metal container (such as a pitcher or saucepan) and you see steam starting to condense, that indicates that the water is colder than the temperature of the surrounding air. [2] X Research Source
- In a nutshell, water vapor condenses faster when the water is colder than the air temperature.
- If you see steam condensing on the outside of the cup for 2 or 3 minutes, it’s very cold water.
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Pay attention to whether the water forms a layer of ice. If it is very cold water and is about to freeze, you will see a thin layer of ice appear around the edges. Water that is about to freeze to ice usually has a temperature close to 0°C, but can still be slightly warmer, between 1°C and 2°C. [3] X Research Sources
- For example, when you look at the bowl of water in the freezer, you’ll see some formed at the edge of the water close to the side of the bowl.
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Check if the water is frozen. This is a simple step and you just need to look at it to know. If the water has frozen (to ice), the temperature of the water will be at or below 0°C.
Guess the heat of water by the size of water bubbles
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Notice the small water bubbles when the water starts to heat up. If you want to know the relative temperature of the water while it’s boiling, watch for small bubbles forming on the bottom of a pot or pan. The micro-bubbles indicate that the water has a temperature of about 71°C. [4] X Research Sources
- The water bubbles that appear at such low temperatures are about the size of a “shrimp’s eye” – the size of a pin.
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Keep an eye out for medium-sized water bubbles. During the boiling process, the water bubbles at the bottom of the pot will grow larger and slightly larger than the size of the “shrimp eyes”. This is a good sign that the water is about to reach 79°C. [5] X Research Sources
- You will also see some steam starting to rise from the pot when the water is heated to 79°C.
- The size of the water bubble is now the same as the size of a “crab eye”.
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Notice the large and boiling water bubbles. The water bubbles at the bottom of the pot will grow larger and boil on the surface of the water. At this point, your water has a temperature of about 85°C. You’ll also know when the water reaches 85°C because of the creaking sound coming from the bottom of the pot. [6] X Research Sources
- The first water bubbles to rise to the surface of the water were the size of a “fish eye”.
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Notice the “string of pearls” stage. This is the final stage in the boiling process and before the water comes to a complete boil. The large water bubbles that form at the bottom of the pot will quickly rise to the surface of the water, forming a series of bubbles that boil continuously. The water at this stage has a temperature between 91°C and 96°C. [7] X Research Sources
- Immediately after the “string of pearls” stage, the water will reach 100°C and boil vigorously.
Advice
- If the water contains impurities such as salt, the boiling point will change. The more impurities the water contains, the higher the temperature required to boil the water.
- Altitude also affects the boiling point of water. Although water usually boils at 100°C, at high altitudes it boils at a lower temperature (90°C), due to reduced air pressure. [8] X Research Sources
Warning
- Do not put your fingers or hands in boiling or about to boil water, as you will be severely burned.
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This article was co-written by Meredith Juncker, PhD. Meredith Juncker is a PhD student in Biochemistry and Molecular Biology at Louisiana State University’s Center for Health Sciences. Her studies focus on proteins and neurodegenerative diseases.
This article has been viewed 3,176 times.
What do you do when you need to determine the temperature of the water but don’t have a waterproof thermometer available? This article will help you estimate the temperature of water by watching for signs that the water is about to boil or freeze. In addition, you will be taught how to use your hand or elbow to guess the temperature of the water. However, determining the temperature of the water without using a thermometer will not give you the exact temperature.
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