Question

How many calories are needed to raise the temperature of 2g of water 3 C?

Answer 1

Answer:

The number of calories needed is 6c.

Explanation:

The amount of energy $Q$ needed to raise the temperature $\Delta T$ of water of mass $m$ is

$Q = mC\Delta T$

where $C = 1cal/g\cdot C$ is the specific heat capacity of water.

Putting in numbers into equation (1), we get:

$Q = (2g)(1)(3^oC )$

$\boxed{Q = 6\:cal }$

which is the number of calories needed.