Specific heat is the amount of heat required to raise the temperature of unit mass of substance through 10 . Hence , if a substance heats up quickly would have a low specific heat capacity .

Answer. Because sand cannot hold heat, it needs a constant source of energy to stay warm(The Sun). so during the night when the sun is not shining the sand loses all its heat, making the desert night cold. Sand is the biggest reason why deserts are hot during the day and cold during the night.

It is actually sand, which turns the entire phenomenon hot. Sand cannot hold the heat. During the daytime, it stays warm, and when the Sun is absent it loses all its heat making the nights colder. …

Why would sand heat and cool faster than water? Sand has a lower specific heat capacity than water. You just studied 10 terms!

The sand should both heat and cool faster than the water. This is because water has a higher specific heat ca- pacity than sand – meaning that it takes a lot of heat, or energy, to raise the temperature of water one degree, whereas it takes comparatively little energy to change the temperature of sand by one degree.

Once they are placed in the boiling water, the substance with the lowest specific heat will increase in temperature the fastest. Copper, having the lowest specific heat, will reach 60°C first, while water would be the last.

Hydrogen

Or, if each substance was exposed to constant heat, the substance with the lowest specific heat would heat up the fastest. Since copper has the lowest specific heat, the answer is copper.

The amount of time of contact, the area of contact, and the specific heals of the substances, the factors affect heat transfer between a warm and a cool substance. Explanation: Heat transfers from a very hot body always, and into a colder body.

(The first law of thermodynamics) When you put a hot object in contact with a cold one, heat will flow from the warmer to the cooler. As a result, the warmer one will usually cool down and the cooler one will usually warm up. Eventually, they will reach the same temperature and heat flow will stop.

Factors that affect rate of heat flow include the conductivity of the material, temperature difference across the material, thickness of the material, and area of the material. Different materials have greater or lesser resistance to heat transfer, making them better insulators or better conductors.

What are the factors that affect heat? It’s an open-ended question; but two important factors are specific heat and temperature. Specific heat is a heat-constant of a material per unit mass per degree of temperature change (in units of energy per mass and temperature), like Joules/Kg-°C .

Here are the factors that affect the rate of conduction:

• Temperature difference. The greater the difference in temperature between the two ends of the bar, the greater the rate of thermal energy transfer, so more heat is transferred.
• Cross-sectional area.
• Length (distance heat must travel).
• Time.

Which of the following does not affect the amount of heat transferred in solids? The value of specific heat.

The “radiation effect” results from radiation heat exchange between human bodies and surrounding surfaces, such as walls and ceilings. It may lead to phenomena such as houses feeling cooler in the winter and warmer in the summer at the same temperature.

The overall heat transfer coefficients were affected mainly by temperature difference between the liquid evaporating and the steam condensing temperatures, evaporating temperature, irrigation density, liquid viscosity, and the heating tube length, but the Prandtl number was also significant.

It is clear that thermal conductivity of copper is better than aluminium and specific heat of copper is less than that of aluminium. So it is clear that copper will transfer more heat. But aluminium is preferred in automobile radiator and many other heat transfer application over copper.

water vapor

The factors affecting overall heat transfer coefficient are : Physiochemical properties of fluids ( both cold and hot ) such a viscosity , density, specific heat, thermal conductivity.

Heat transfer coefficient depends on both the thermal properties of a medium, the hydrodynamic characteristics of its flow, and the hydrodynamic and thermal boundary conditions.

Composition

1. = the overall heat transfer coefficient (W/(m2•K))
2. = the contact area for each fluid side (m2) (with and expressing either surface)
3. = the thermal conductivity of the material (W/(m·K))
4. = the individual convection heat transfer coefficient for each fluid (W/(m2•K))
5. = the wall thickness (m).

Assuming the heat transfer surface and temperature difference remain unchanged, the greater the U value, the greater the heat transfer rate. In other words, this means that for a certain heat exchanger and product, a higher U value could lead to shorter batch times and increased production/revenue.

This in turn influences the heat transfer coefficient, despite possible identical temperature differences. The heat transfer coefficient is therefore also dependent on the direction of heat flow. In contrast to the thermal conductivity, the heat transfer coefficient is not a material constant.

In addition, with traditional definition of convective heat transfer coefficient, which is based on the temperature difference of an interior surface and room air, the coefficient value can be negative.

According to the classical sign convention, heat transfer to a system and work done by a system are positive; heat transfer from a system and work done on a system are negative.

Heat-transfer coefficient equal to the heat flow (Q) across the heat-transfer surface divided by the average temperature (Δt) and the area of the heat-transfer surface (F)

The overall heat transfer coefficient, or U-value, refers to how well heat is conducted through over a series of resistant mediums. Its units are the W/(m2°C) [Btu/(hr-ft2°F)].