A heating coil inside an electric kettle delivers 2.1 kW of electric power to the water in the k

step 1 Question number 24. In this question, the mass of water is given as 0 .5 kg. The change in tempe

A heating coil inside an electric kettle delivers 2.1 kW of...

A heating coil inside an electric kettle delivers $2.1 \mathrm{kW}$ of electric power to the water in the kettle. How long will it take to raise the temperature of $0.50 \mathrm{kg}$ of water from $20.0^{\circ} \mathrm{C}$ to $100.0^{\circ} \mathrm{C} ?$ (tutorial: heating)

Key Concepts

Temperature Change

Temperature change refers to the difference between the final and initial temperatures of a substance. This concept is vital when calculating the energy required for thermal processes, as the energy is directly proportional to the magnitude of the temperature change.

Specific Heat Capacity

Specific heat capacity is a property of a substance that indicates the amount of energy required to raise the temperature of one kilogram of the substance by one degree Celsius. It is crucial in calculations involving heating because it directly influences the total energy needed to achieve a particular temperature change.

Time Calculation in Energy Transfer

The time taken for a process involving energy transfer can be calculated by dividing the total energy required by the power provided. This relation shows how long it will take for a given power source to deliver enough energy to achieve the desired temperature change in a substance.

Electrical Power

Electrical power represents the rate at which electrical energy is consumed or transferred. It is measured in watts (W), where one watt equals one joule per second. Understanding electrical power is essential because it directly relates the energy input to the process of heating or performing work over time.

Energy

Energy is the capacity to do work or produce heat and is measured in joules (J). In thermal processes, energy is required to change the temperature of an object. The amount of energy needed depends on the mass of the object, its specific heat capacity, and the change in temperature.

Transcript

Please give Ace some feedback