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Questions and Answers
Consider two objects of equal mass, one with a high specific heat capacity and the other with a low specific heat capacity. If both objects absorb the same amount of heat, which of the following statements is true?
Consider two objects of equal mass, one with a high specific heat capacity and the other with a low specific heat capacity. If both objects absorb the same amount of heat, which of the following statements is true?
- Both objects will experience the same temperature change, regardless of their specific heat capacities.
- The object with the low specific heat capacity will experience a larger temperature change. (correct)
- The object with the high specific heat capacity will experience a larger temperature change.
- The object with the low specific heat capacity will experience a smaller temperature change.
A scientist uses a calorimeter to determine the specific heat of an unknown metal. The metal is heated and then placed in the calorimeter. What data is essential for calculating the specific heat of the metal?
A scientist uses a calorimeter to determine the specific heat of an unknown metal. The metal is heated and then placed in the calorimeter. What data is essential for calculating the specific heat of the metal?
- The color of the metal, the ambient humidity, and the time the metal spends in the water.
- The water's volume, the metal's final temperature, and the calorimeter's material composition.
- The metal's volume, the water's final temperature, and the atmospheric pressure.
- The metal's mass, the initial and final temperatures of the water, and the heat capacity of the calorimeter. (correct)
If a 2 kg block of aluminum and a 2 kg block of copper, both initially at $20^\circ C$, absorb 10 kJ of heat, which block will have the higher final temperature? (Specific heat of aluminum is approximately 900 J/kg·°C and copper is approximately 385 J/kg·°C)
If a 2 kg block of aluminum and a 2 kg block of copper, both initially at $20^\circ C$, absorb 10 kJ of heat, which block will have the higher final temperature? (Specific heat of aluminum is approximately 900 J/kg·°C and copper is approximately 385 J/kg·°C)
- The aluminum block will have a higher final temperature.
- The copper block will have a higher final temperature. (correct)
- Both blocks will have the same final temperature.
- It is impossible to determine without knowing the exact volume of each block.
Consider two substances, A and B, with specific heat capacities $C_A$ and $C_B$ respectively. If $C_A > C_B$, which of the following statements accurately describes their thermal behavior?
Consider two substances, A and B, with specific heat capacities $C_A$ and $C_B$ respectively. If $C_A > C_B$, which of the following statements accurately describes their thermal behavior?
Why is water effective as a coolant in many industrial applications?
Why is water effective as a coolant in many industrial applications?
A blacksmith plunges a red-hot iron horseshoe into a bucket of water. Which of the following occurs regarding heat transfer?
A blacksmith plunges a red-hot iron horseshoe into a bucket of water. Which of the following occurs regarding heat transfer?
Two identical glasses of water are placed on a table. Glass A has ice cubes in it, while Glass B is at room temperature. Which of the following statements accurately compares the thermal energy of the two glasses?
Two identical glasses of water are placed on a table. Glass A has ice cubes in it, while Glass B is at room temperature. Which of the following statements accurately compares the thermal energy of the two glasses?
A metal rod is heated at one end. What mode of heat transfer is primarily responsible for the heat felt at the other end of the rod?
A metal rod is heated at one end. What mode of heat transfer is primarily responsible for the heat felt at the other end of the rod?
Consider two objects made of the same material but with different masses. If both objects are at the same temperature, which one has more thermal energy?
Consider two objects made of the same material but with different masses. If both objects are at the same temperature, which one has more thermal energy?
A scientist discovers a new material and wants to determine its specific heat capacity. They heat a 500g sample of the material to $80^\circ C$ and then place it into 200g of water initially at $20^\circ C$ in an insulated container. The final temperature of the water and material is $25^\circ C$. What is the specific heat capacity of the material? (The specific heat capacity of water is 4186 J/kg·°C)
A scientist discovers a new material and wants to determine its specific heat capacity. They heat a 500g sample of the material to $80^\circ C$ and then place it into 200g of water initially at $20^\circ C$ in an insulated container. The final temperature of the water and material is $25^\circ C$. What is the specific heat capacity of the material? (The specific heat capacity of water is 4186 J/kg·°C)
Flashcards
Temperature
Temperature
Measure of the average kinetic energy of an object's particles.
Thermal Energy
Thermal Energy
Sum of an object's kinetic and potential energy.
Heat
Heat
Energy transferred due to temperature differences.
Specific Heat
Specific Heat
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Coolant
Coolant
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Thermal Energy Formula
Thermal Energy Formula
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What does 'Q' represent?
What does 'Q' represent?
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What does 'C' represent?
What does 'C' represent?
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Calorimeter
Calorimeter
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SI Base Unit of Temperature
SI Base Unit of Temperature
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Study Notes
- An object feels hotter as its particles' kinetic energy increases.
- An object's temperature measures the average kinetic energy of its constituent particles.
- Temperature is scientifically classified as Kelvin, but commonly measured in Celsius or Fahrenheit.
- One Kelvin equals one degree Celsius.
- Thermal energy is the total kinetic and potential energy of all particles within an object.
- Thermal energy depends on mass; as mass increases, so does thermal energy.
- Heat is energy transferred between objects due to temperature differences.
- Warmer objects heat cooler objects, never the reverse.
- Specific heat is the heat needed to raise the temperature of 1 kg of a material by 1 degree Celsius.
- The SI unit for specific heat is j/kg C.
- Low specific heat materials require less energy to change temperature.
- High specific heat materials require more energy to change temperature.
- A coolant absorbs a lot of heat with minimal temperature change.
- Water serves as an effective coolant.
- Formula TE = M(kg)xTf-TIx Specific heat
- Thermal Energy is represented as Q
- Specific heat is represented as C
- Calorimeters measure a sample's mass and the water's initial temperature.
- The sample is heated, its temperature measured, and then placed in the calorimeter's water.
- This process isolates the sample so scientists can accurately identify a substance.
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