Question

1.Щоб білизна швидше висохла, її розпрямляють і розвішують біля обігрівача адже швидкість випаровування рідини. А) залежить від роду рідини Б) збільшується зі збільшенням температури рідини В) Збільшується зі збільшенням площі вільної поверхні рідини Г) Сповільнюється зі збільшенням вологісті повітря.2. Андрiй iз братом захопилися комп'ютерною грою та забули про те, що поставили на плиту чайник. Скільки теплоти було витрачено даремно, якщо википіло 2 л води?СРОЧНО ПРОШУ НУЖНО НА ЗАВТРА ДАЮ 50 БАЛОВ!!!!!​

Answer 1

Ответ:

1 а тому що при збільшенні температури вода швидше випаровується

Объяснение:

2 хз

Answer 2

How to dry laundry faster

To dry laundry faster, it is commonly recommended to straighten and hang it near a heater because the speed of liquid evaporation depends on several factors. These factors include the type of liquid, the temperature of the liquid, the surface area of the liquid, and the humidity of the air.

A) The speed of evaporation depends on the type of liquid. Different liquids have different rates of evaporation. For example, water evaporates faster than oil. However, in the case of laundry, the liquid is water, so this factor does not apply.

B) The speed of evaporation increases with an increase in the temperature of the liquid. Higher temperatures provide more energy to the water molecules, increasing their kinetic energy and allowing them to escape into the air more quickly. Therefore, warmer water will evaporate faster than colder water.

C) The speed of evaporation increases with an increase in the surface area of the liquid. When the liquid is spread out over a larger area, more molecules are exposed to the air, increasing the chances of evaporation. Hanging laundry near a heater can help increase the surface area of the liquid, allowing it to dry faster.

D) The speed of evaporation slows down with an increase in the humidity of the air. When the air is already saturated with moisture, it becomes more difficult for water molecules to escape into the air. Therefore, higher humidity levels can slow down the evaporation process.

Based on the given options, option C) "The speed of evaporation increases with an increase in the surface area of the liquid" is the most relevant to drying laundry faster by hanging it near a heater. However, it is important to note that other factors, such as temperature and humidity, also play a role in the drying process.

Calculation of wasted heat from boiling water

To calculate the amount of wasted heat from boiling water, we need to know the initial temperature of the water, the final temperature of the water, and the amount of water that has evaporated.

Unfortunately, the given question does not provide the initial and final temperatures of the water. Therefore, it is not possible to calculate the exact amount of wasted heat without this information.

However, we can provide a general approach to calculating the wasted heat when boiling water. The amount of heat required to raise the temperature of water from its initial temperature to its boiling point is given by the equation:

Q = m * c * ΔT

Where: - Q is the amount of heat (in joules) - m is the mass of water (in kilograms) - c is the specific heat capacity of water (approximately 4.18 J/g°C) - ΔT is the change in temperature (in °C)

Once the water reaches its boiling point, it will start to evaporate. The heat required for evaporation is given by the equation:

Q = m * Lv

Where: - Q is the amount of heat (in joules) - m is the mass of water (in kilograms) - Lv is the latent heat of vaporization of water (approximately 2,260 kJ/kg)

To calculate the total wasted heat, we need to know the mass of water that has evaporated. In the given question, it is mentioned that 2 liters (or 2 kilograms) of water has evaporated.

Without the initial and final temperatures of the water, it is not possible to calculate the exact amount of wasted heat. However, you can use the provided equations and the known values to estimate the amount of wasted heat.

Please note that the specific heat capacity and latent heat of vaporization values used in the calculations are approximate values for water and may vary slightly depending on the conditions.