Fourier's law of heat conduction is (where Q = Amount of heat flow through the body in unit time, A = Surface area of heat flow, taken at right angles to the direction of heat flow, dT = Temperature difference on the two faces of the body, dx = Thickness of the body, through which the heat flows, taken along the direction of heat flow, and k = Thermal conductivity of the body)

Heat and Mass Transfer
Fourier's law of heat conduction is (where Q = Amount of heat flow through the body in unit time, A = Surface area of heat flow, taken at right angles to the direction of heat flow, dT = Temperature difference on the two faces of the body, dx = Thickness of the body, through which the heat flows, taken along the direction of heat flow, and k = Thermal conductivity of the body)

k. A. (dT/dx)

k. A. (dx/dT)

k. (dT/dx)

k. (dx/dT)

k. A. (dT/dx)

k. A. (dx/dT)

k. (dT/dx)

k. (dx/dT)

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Heat and Mass Transfer
When heat is transferred from one particle of hot body to another by actual motion of the heated particles, it is referred to as heat transfer by

Radiation

Conduction

Conduction and convection

Convection

Radiation

Conduction

Conduction and convection

Convection

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Heat and Mass Transfer
A composite slab has two layers of different materials with thermal conductivities k₁ and k₂. If each layer has the same thickness, then the equivalent thermal conductivity of the slab will be

(k₁ + k₂)/ k₁ k₂

k₁ k₂

2 k₁ k₂/ (k₁ + k₂)

(k₁ + k₂)

(k₁ + k₂)/ k₁ k₂

k₁ k₂

2 k₁ k₂/ (k₁ + k₂)

(k₁ + k₂)

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Heat and Mass Transfer
The critical temperature is the temperature

Above which a gas may explode

Below which a gas is always liquefied

Below which a gas does not obey gas laws

Above which a gas will never liquefied

Above which a gas may explode

Below which a gas is always liquefied

Below which a gas does not obey gas laws

Above which a gas will never liquefied

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Heat and Mass Transfer
In heat transfer, conductance equals conductivity (kcal/hr/sq.m/°C/cm) divided by

K.cal (heat)

°C (temperature)

Hr (time)

Sq. m (area)

K.cal (heat)

°C (temperature)

Hr (time)

Sq. m (area)

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Heat and Mass Transfer
Heat is closely related with

Energy

Liquids

Temperature

Entropy

Energy

Liquids

Temperature

Entropy

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Heat and Mass Transfer

Heat and Mass Transfer When heat is transferred from one particle of hot body to another by actual motion of the heated particles, it is referred to as heat transfer by

Heat and Mass Transfer A composite slab has two layers of different materials with thermal conductivities k₁ and k₂. If each layer has the same thickness, then the equivalent thermal conductivity of the slab will be

Heat and Mass Transfer The critical temperature is the temperature

Heat and Mass Transfer In heat transfer, conductance equals conductivity (kcal/hr/sq.m/°C/cm) divided by

Heat and Mass Transfer Heat is closely related with

Heat and Mass Transfer
When heat is transferred from one particle of hot body to another by actual motion of the heated particles, it is referred to as heat transfer by

Heat and Mass Transfer
A composite slab has two layers of different materials with thermal conductivities k₁ and k₂. If each layer has the same thickness, then the equivalent thermal conductivity of the slab will be

Heat and Mass Transfer
The critical temperature is the temperature

Heat and Mass Transfer
In heat transfer, conductance equals conductivity (kcal/hr/sq.m/°C/cm) divided by

Heat and Mass Transfer
Heat is closely related with