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How much heat is removed from the skin by the evaporation of 190 G of isopropyl alcohol?
The amount of heat removed when 190 g of isopropyl alcohol evaporates depends on the heat of vaporization of isopropyl alcohol, which is approximately 42 kJ/mol. Using this value, you can calculate the heat removed by multiplying the mass of isopropyl alcohol by the heat of vaporization (in J/g) and converting the result to the desired units (e.g., kJ).
What else can I help you with?
Does rubbing alcohol have a high or low specific heat capacity?
the boiling point of isopropyl alcohol is 82.5 degrees celsius or 355.5 K
Why does rubbing alcohol have a higher heat capacity then water?
Rubbing alcohol, primarily composed of isopropyl alcohol, has a higher heat capacity than water due to its molecular structure and bonding characteristics. The presence of hydrogen bonds in water allows it to store heat effectively, but isopropyl alcohol has a lower density and fewer hydrogen bonds, which affects its ability to absorb heat. Additionally, the specific heat capacity of a substance is influenced by its mass and the energy required to change its temperature, making the heat capacity of rubbing alcohol relatively higher in certain contexts, despite water’s overall higher heat capacity per unit mass.
What phase change occurs before and after rubbing alcohol absorbs?
Before rubbing alcohol absorbs, it is a liquid. While it absorbs (heat), the phase change occurring is evaporation. As the alcohol takes in heat, it turns into a gas.
What chemical does the rubbing alcohol have that makes it stingy when applied to wounds?
Rubbing alcohol, or isopropyl alcohol, contains a compound that causes a cooling sensation when applied to the skin. This compound, when it comes in contact with the skin, evaporates rapidly and draws heat away from the body, creating a stinging sensation.
Is Rubbing alcohol evaporting absorbing or releasing energy?
Rubbing alcohol (isopropyl alcohol) absorbs energy when it evaporates. As it transitions from a liquid to a gas, it requires heat energy from its surroundings, which results in a cooling effect. This process is endothermic, meaning it takes in energy rather than releasing it.
How much heat is removed from the skin by the evaporation of 190 g about 12 cup of isopropyl alcohol?
The amount of heat removed can be calculated using the formula q = m*l, where q is the heat removed, m is the mass of the substance evaporated (190 g), and l is the heat of vaporization of isopropyl alcohol (204 kJ/kg). Convert mass to kg (0.190 kg) and calculate the heat removed: q = 0.190 kg * 204 kJ/kg = 38.76 kJ. So, approximately 38.76 kJ of heat is removed from the skin by the evaporation of 190 g of isopropyl alcohol.
Is heat energy being added or removed during the process of evaporation?
In condensation heat is removed In evaporation heat is added
How can I safely heat up isopropyl alcohol?
To safely heat up isopropyl alcohol, use a heat source like a hot plate or water bath instead of an open flame. Make sure the area is well-ventilated to prevent the buildup of fumes. Use a thermometer to monitor the temperature and avoid overheating, as isopropyl alcohol is flammable.
How should isopropyl alcohol be stored to ensure its effectiveness and safety?
Isopropyl alcohol should be stored in a cool, dry place away from direct sunlight and sources of heat. It should be kept in a tightly sealed container to prevent evaporation and contamination. Additionally, it should be stored away from any flammable materials to ensure safety.
Why does isopropyl alcohol burn when it comes into contact with an open flame?
Isopropyl alcohol burns when it touches an open flame because it is a flammable substance that easily ignites when exposed to heat.
How does isopropyl alcohol combustion occur and what are the potential risks associated with it?
Isopropyl alcohol combustion happens when the alcohol is exposed to a flame or spark, causing it to burn and release heat and light. The potential risks associated with isopropyl alcohol combustion include fire, burns, and inhalation of toxic fumes. It is important to handle isopropyl alcohol carefully and store it in a safe manner to prevent accidents.
Why does isopropyl alcohol expire?
Isopropyl alcohol expires because over time, it can break down and lose its effectiveness as a disinfectant. This can happen due to exposure to air, light, or heat, which can cause the alcohol to evaporate or degrade.
Does rubbing alcohol have a high or low specific heat capacity?
the boiling point of isopropyl alcohol is 82.5 degrees celsius or 355.5 K
What is the name of the energy removed in the process of evaporation?
heat energy
How flammable is isopropyl alcohol compared to other common household chemicals?
Isopropyl alcohol is more flammable than most other common household chemicals. It has a low flash point and can easily ignite when exposed to heat or flames. It is important to handle isopropyl alcohol with caution and store it properly to prevent accidents.
Does alcohol absorb cold?
No. Its evaporation uses heat energy and causes it to cool.
Which solution should be used to clean a CPU and a heat sink?
Isopropyl alcohol and a microfiber cloth are commonly used to clean a CPU and heat sink. Apply the alcohol to the cloth and gently wipe the surfaces to remove any dirt or thermal paste build-up. Ensure both components are completely dry before reinstalling.
