Calculate the amount of energy required (in joules) to heat 2.5 kg of water from 18.5 °C to 55.0 °C.
Interpretation:
The heat required in calories to raise the temperature of water should be calculated.
Concept Introduction:
The specific heat is defined as the amount of heat per unit mass needed to raise the temperature by one degree Celsius.
It is mathematically represented as follows:
Here, Q is heat, m is mass, s is specific heat capacity and
Given Information:
The mass of water is 2.5 kg, initial temperature is
Calculation:
From table 10.1, the specific heat capacity of water (liquid) is
The heat required can be calculated using the following equation:
Or,
On putting the values,
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