Question

question 6 (1 point)
use the following information to answer the next question.
in a chemical activity performed by a group of students,
150 g of wood was combusted and the temperature of
the system changed from 27 °c to 45 °c. the specific
heat of wood is 1.26 j/g°c.
what is the amount of heat energy produced?
1104 j
1609 j
2492 j
3402 j
5103 j

Explanation:

Step1: Recall the heat formula

The formula for heat energy \( Q \) is \( Q = mc\Delta T \), where \( m \) is mass, \( c \) is specific heat, and \( \Delta T \) is temperature change.

Step2: Calculate temperature change

\( \Delta T = T_2 - T_1 = 45^\circ\text{C} - 27^\circ\text{C} = 18^\circ\text{C} \)

Step3: Substitute values into formula

\( m = 150 \, \text{g} \), \( c = 1.26 \, \text{J/g}^\circ\text{C} \), \( \Delta T = 18^\circ\text{C} \)
\( Q = 150 \times 1.26 \times 18 \)
\( Q = 150 \times 22.68 \)
\( Q = 3402 \, \text{J} \)

Answer:

3402 J (corresponding to the option: 3402 J)