The temperature of ice can vary from -273.15° to 0° Celsius as long as it is at atmospheric pressure, at which temperature H2O appears as a solid.
The temperature of the ice-water mixture is 0 °, is supposed to be if you want to cool down again, you must first make all the water into ice, there will not be 0 ° below the state of water. When all the water into ice, the temperature of the ice can continue to fall until it reaches the ambient temperature.
Expanded
The use and function of ice
1, ice pain: when you accidentally fingertip into the small prick need to use a needle to remove, can be the tip of the finger in the ice on the frozen to numbness, and then pick the prick will not feel the pain.
2, ice to stop bleeding: the surface of the skin or subcutaneous bleeding, with ice on the bleeding, can help coagulation.
3, ice to stop itching: the body itchy block, scratching easily infected, and will be more and more itchy, such as ice cold compress, the itch can be completely eliminated.
4, ice for burns: If you accidentally burn your hand, you can pour ice into the basin, and then the burns into the tray frozen, not only pain but also to prevent redness and blisters.
5, ice antibacterial: because ice has antibacterial and antiseptic effect, with ice frozen infected, it can effectively prevent bacterial reproduction, wound infection.
6, high fever: high fever is a common condition, at this time, in addition to medication, but also need to lower the temperature, with ice can often make the patient to safety. Summer heatstroke, can also be used to ice external cooling.
7, detoxification: rubbing the itch with ice can stop itching. Venomous insect bites, in addition to medication, but also available ice to stop the itching and pain, to prevent the spread of toxins.
8, reduce heart rate: when the human heart rate of more than 100 ~ 140 times per minute, with a towel dipped into ice water, wrung out immediately after the face, wait a moment, too fast heart rate will slow down significantly.
Reference source; Baidu encyclopedia - ice