What is the quantity of heat required to raise the temperature of 6.3 kg of glass from 6 degrees C to 210 degrees C if the specific heat capacity of glass is 670 J/kg K?

Study for the ABSA 4th Class Power Engineer Test. Explore questions with hints and explanations. Get ready to ace the exam!

To determine the quantity of heat required to raise the temperature of a substance, the formula used is:

[ Q = m \cdot c \cdot \Delta T ]

where:

  • ( Q ) is the heat energy (in joules),

  • ( m ) is the mass of the substance (in kilograms),

  • ( c ) is the specific heat capacity (in J/kg·K), and

  • ( \Delta T ) is the change in temperature (in K or °C, since the size of the degree is the same).

In this case, we have the mass of the glass as 6.3 kg, the specific heat capacity of glass as 670 J/kg·K, and the temperature change can be calculated as follows:

[

\Delta T = T_{final} - T_{initial} = 210°C - 6°C = 204°C

]

Now, substituting these values into the heat energy formula gives:

[

Q = 6.3, \text{kg} \cdot 670, \text{J/kg·K} \cdot 204, \text{K}

]

Calculating this step-by-step:

1

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