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Which phase of matter has maximum value of temperature coefficient of cubical expansion?
  • a)
    Gaseous
  • b)
    Solid​
  • c)
    Liquid
  • d)
    none of these
Correct answer is option 'A'. Can you explain this answer?
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Which phase of matter has maximum value of temperature coefficient of ...
Gas expands more than solid and liquid because gas particles are far apart hence freely move.
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Which phase of matter has maximum value of temperature coefficient of ...
Gaseous phase of matter has maximum value of temperature coefficient of cubical expansion. This can be explained as follows:

Explanation:
The temperature coefficient of cubical expansion is defined as the change in volume of a substance per unit volume per degree change in temperature. Mathematically, it is given as:
γ = (1/V) * (∂V/∂T)
where γ is the temperature coefficient of cubical expansion, V is the volume of the substance, and (∂V/∂T) is the partial derivative of volume with respect to temperature.

The value of γ depends on the nature of the substance and its phase. In general, gases have higher values of γ compared to liquids and solids. This is because gases have weaker intermolecular forces and greater molecular mobility, which allows them to expand more upon heating.

In particular, the value of γ for a gas is directly proportional to its absolute temperature. This can be expressed as:
γ = α * T
where α is a constant of proportionality and T is the absolute temperature. Thus, as the temperature of a gas increases, its value of γ also increases.

Therefore, the phase of matter with the maximum value of temperature coefficient of cubical expansion is the gaseous phase. This is because gases have the weakest intermolecular forces and the greatest molecular mobility, which allows them to expand the most upon heating.
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Which phase of matter has maximum value of temperature coefficient of ...
Gas expands more than solid and liquid because gas particles are far apart hence freely move
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Attempt All sub parts from each question.Railway track expansion joint: Expansion and contraction of steel and concrete structure due to seasonal heating and cooling is a common problem found in civil engineering. To combat this problem, engineers put expansion joints to absorb these changes.This problem is compounded on railway tracks. This could lead to rail buckling, known in the industry as “sun kink”, as shown below, and cause the derailment of train. When exposed to temperature variations, the rail tends to vary its length. If this tendency is freely allowed, for a temperaturevariance Δt, the rail length L will vary by ΔL. This length variance can be computed as:ΔL = αLΔtwhere α = expansion coefficient of steel= 11.5 x 10–6 °C.The coefficient of thermal expansion is defined as the fractional increase in length per unit rise in temperature. Traditional railway tracks are of standard lengths. When the tracks are laid, the lengths are joined end to end using “fishplates”—short lengths of steel plate overlapping the joint, and bolted to the ends of the rails. At each joint there must be a short gap (≈ 1/8") between the rail ends, to allow for longitudinal thermal expansion of the rails on hot days.Q. What is the value of thermal expansion coefficient of steel?

Attempt All sub parts from each question.Railway track expansion joint: Expansion and contraction of steel and concrete structure due to seasonal heating and cooling is a common problem found in civil engineering. To combat this problem, engineers put expansion joints to absorb these changes.This problem is compounded on railway tracks. This could lead to rail buckling, known in the industry as “sun kink”, as shown below, and cause the derailment of train. When exposed to temperature variations, the rail tends to vary its length. If this tendency is freely allowed, for a temperaturevariance Δt, the rail length L will vary by ΔL. This length variance can be computed as:ΔL = αLΔtwhere α = expansion coefficient of steel= 11.5 x 10–6 °C.The coefficient of thermal expansion is defined as the fractional increase in length per unit rise in temperature. Traditional railway tracks are of standard lengths. When the tracks are laid, the lengths are joined end to end using “fishplates”—short lengths of steel plate overlapping the joint, and bolted to the ends of the rails. At each joint there must be a short gap (≈ 1/8") between the rail ends, to allow for longitudinal thermal expansion of the rails on hot days.Q. Which of the following statement is true?

Attempt All sub parts from each question.Railway track expansion joint: Expansion and contraction of steel and concrete structure due to seasonal heating and cooling is a common problem found in civil engineering. To combat this problem, engineers put expansion joints to absorb these changes.This problem is compounded on railway tracks. This could lead to rail buckling, known in the industry as “sun kink”, as shown below, and cause the derailment of train. When exposed to temperature variations, the rail tends to vary its length. If this tendency is freely allowed, for a temperaturevariance Δt, the rail length L will vary by ΔL. This length variance can be computed as:ΔL = αLΔtwhere α = expansion coefficient of steel= 11.5 x 10–6 °C.The coefficient of thermal expansion is defined as the fractional increase in length per unit rise in temperature. Traditional railway tracks are of standard lengths. When the tracks are laid, the lengths are joined end to end using “fishplates”—short lengths of steel plate overlapping the joint, and bolted to the ends of the rails. At each joint there must be a short gap (≈ 1/8") between the rail ends, to allow for longitudinal thermal expansion of the rails on hot days.Q. What will be the expansion of a 20m long railway steel track for 30°C variation of temperature?

Attempt All sub parts from each question.Railway track expansion joint: Expansion and contraction of steel and concrete structure due to seasonal heating and cooling is a common problem found in civil engineering. To combat this problem, engineers put expansion joints to absorb these changes.This problem is compounded on railway tracks. This could lead to rail buckling, known in the industry as “sun kink”, as shown below, and cause the derailment of train. When exposed to temperature variations, the rail tends to vary its length. If this tendency is freely allowed, for a temperaturevariance Δt, the rail length L will vary by ΔL. This length variance can be computed as:ΔL = αLΔtwhere α = expansion coefficient of steel= 11.5 x 10–6 °C.The coefficient of thermal expansion is defined as the fractional increase in length per unit rise in temperature. Traditional railway tracks are of standard lengths. When the tracks are laid, the lengths are joined end to end using “fishplates”—short lengths of steel plate overlapping the joint, and bolted to the ends of the rails. At each joint there must be a short gap (≈ 1/8") between the rail ends, to allow for longitudinal thermal expansion of the rails on hot days.Q. At each railway track joint a short gap of ............... (approximately) is left.

Attempt All sub parts from each question.Railway track expansion joint: Expansion and contraction of steel and concrete structure due to seasonal heating and cooling is a common problem found in civil engineering. To combat this problem, engineers put expansion joints to absorb these changes.This problem is compounded on railway tracks. This could lead to rail buckling, known in the industry as “sun kink”, as shown below, and cause the derailment of train. When exposed to temperature variations, the rail tends to vary its length. If this tendency is freely allowed, for a temperaturevariance Δt, the rail length L will vary by ΔL. This length variance can be computed as:ΔL = αLΔtwhere α = expansion coefficient of steel= 11.5 x 10–6 °C.The coefficient of thermal expansion is defined as the fractional increase in length per unit rise in temperature. Traditional railway tracks are of standard lengths. When the tracks are laid, the lengths are joined end to end using “fishplates”—short lengths of steel plate overlapping the joint, and bolted to the ends of the rails. At each joint there must be a short gap (≈ 1/8") between the rail ends, to allow for longitudinal thermal expansion of the rails on hot days.Q. “Sun kink” is the

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Which phase of matter has maximum value of temperature coefficient of cubical expansion?a)Gaseousb)Solid​c)Liquidd)none of theseCorrect answer is option 'A'. Can you explain this answer?
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