The equivalance of two systems in thermal equilibrium is represented by the property of

Options

A. heat
B. energy
C. temperature
D. specific heat

Answer

To solve the question regarding the equivalence of two systems in thermal equilibrium, we can follow these steps:

### Step 1: Understand Thermal Equilibrium
Thermal equilibrium occurs when two systems are in contact and there is no net flow of thermal energy between them. This means that both systems have reached the same temperature.

### Step 2: Identify the Property Representing Equivalence
The question asks which property represents the equivalence of two systems in thermal equilibrium. The key property that defines thermal equilibrium is temperature.

### Step 3: Analyze the Options
Let's evaluate the given options:
- **Heat**: This refers to the transfer of thermal energy and can vary between systems in thermal equilibrium.
- **Energy**: This is a broader term and can also differ between systems in thermal equilibrium.
- **Temperature**: This is the measure of thermal energy of a system and must be the same for both systems in thermal equilibrium.
- **Specific Heat**: This property refers to the amount of heat required to change the temperature of a unit mass of a substance by one degree Celsius and can differ between materials.

### Step 4: Conclusion
Since temperature is the only property that must be equal for two systems to be in thermal equilibrium, the correct answer is temperature.

### Final Answer:
The equivalence of two systems in thermal equilibrium is represented by the property of **temperature**.

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