Question

1. choose the best answer.

it takes ____ j to increase the temperature of 1 kg of water by 1 °c.
4200
1800
1
100

Explanation:

Step1: Recall the specific heat capacity formula

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

Step2: Substitute the values for water

For water, \(c = 4200\space J/(kg\cdot^{\circ}C)\), \(m = 1\space kg\), \(\Delta T=1^{\circ}C\). Then \(Q=(1\space kg)\times(4200\space J/(kg\cdot^{\circ}C))\times(1^{\circ}C)\)

Step3: Calculate \(Q\)

\(Q = 4200\space J\)

Answer:

4200