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25 December, 00:16

Beaker A contains 100 mL of water at a temperature of 25 °C. Beaker B contains 100 mL of water at a temperature of 60 °C. Which of the following statement is true? a. Beaker A has lower kinetic energy than beaker B

b. Beaker A has higher thermal energy than beaker B

c. Beaker A has higher potential energy than beaker B

d. Beaker A has lower potential energy than beaker B

e. Beaker A has higher kinetic energy than beaker B

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  1. 25 December, 00:54
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    Only option A is correct. Beaker A has lower kinetic energy than beaker B.

    Explanation:

    Step 1: Data given

    Beaker 1 has a volume of 100 mL at 25 °C

    Beaker B has a volume of 100 mL at 60 °C

    Thermal energy = m*c*T

    Thermal energy beaker A = 100 grams*4.184 * 25°C

    Thermal energy beaker B = 100 grams * 4.184*60°C

    ⇒ Since both beakers contain the same amount of water, the thermal energy depends on the temperature.

    Since beaker B has a higher temperature, it has a higher thermal energy than beaker A

    When we heat a substance, its temperature rises and causes an increase in the kinetic energy of its constituent molecules. Temperature is, in fact, a measure of the kinetic energy of molecules.

    This means beaker B has a higher kinetic energy than beaker A

    Potential energy doesn't depend on temperature. this means the potential energy of beaker A and beaker B is the same.

    a. Beaker A has lower kinetic energy than beaker B. This is correct.

    b. Beaker A has higher thermal energy than beaker B. This is false.

    c. Beaker A has higher potential energy than beaker B. This is false.

    d. Beaker A has lower potential energy than beaker B. This is false

    e. Beaker A has higher kinetic energy than beaker B. This is false.
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