Question

2960 j of energy transfer to the water and 96.3 j of energy transfer to the calorimeter from the granite. what is the energy change for the granite?
q_{granite} = ? j
enter either a + or - sign and the magnitude.

Explanation:

Step1: Identify energy transfer

The energy lost by granite is gained by water and calorimeter. So total energy lost by granite is sum of energy gained by water and calorimeter.
$$E_{granite} = -(E_{water} + E_{calorimeter})$$

Step2: Calculate total energy gained

$E_{water} = 2960\ J$, $E_{calorimeter} = 96.3\ J$
Total gained energy: $2960 + 96.3 = 3056.3\ J$

Step3: Determine energy change for granite

Since granite loses energy, its energy change is negative of total gained energy.
$$q_{granite} = -3056.3\ J$$

Answer:

\(-3056.3\)