Two substances A and B of the same mass are heated at a constant rate. The variation of temperature θ of the substances with time t is shown in the figure. Choose the correct statement
- Specify heat of A is greater than that of B
- Specify heat of B is greater than that of A
- Both have some specific heat
- None of the above is true
The Correct Option is A
Approach Solution - 1
the melting point of substance A is 60°C and the melting point of substance B is 20°C. It is given that substance A takes 4 minutes for fusion (melting) and substance B takes 2.5 minutes.
The correct answer is option (A): Specify heat of A is greater than that of B
Approach Solution -2
Given:
Substance A has a higher melting point (60°C) and takes longer to melt (4 minutes).
Substance B has a lower melting point (20°C) and melts faster (2.5 minutes).
Substance A requires more heat to melt because it:
- Melts at a higher temperature.
- Takes longer to melt.
So, the correct statement is (A): \(\text{Specify heat of A is greater than that of B}\)
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Concepts Used:
Conductance
What is conductance?
Conductance is an expression of the ease with which electric current flows through materials like metals and nonmetals. In equations, an uppercase letter G symbolizes conductance. The standard unit of conductance is siemens (S), formerly known as mho.
What is conductance in electricity?
Conductance in electricity is considered the opposite of resistance (R). Resistance is essentially the amount of friction a component presents to the flow of current.
The conductivity of electrolytic solutions is governed by the following factors:
- Interionic attraction
- Solvation of ions
- The viscosity of the solvent
- Temperature