Question

b. determine if its endothermic or exothermic

1. an unknown substance with a mass of 100 grams absorbs 1000 j while undergoing a temperature increase of 15°c. what is the specific heat of the substance?

endothermic or exothermic?

Explanation:

Step1: Recall the formula for specific heat

The formula for specific heat \(c\) is \(c=\frac{Q}{m\Delta T}\), where \(Q\) is the heat absorbed, \(m\) is the mass, and \(\Delta T\) is the temperature change.

Step2: Substitute the given values

Given \(Q = 1000\space J\), \(m=100\space g\), \(\Delta T = 15^{\circ}C\). Substitute into the formula: \(c=\frac{1000}{100\times15}=\frac{1000}{1500}=\frac{2}{3}\approx0.67\space J/(g\cdot^{\circ}C)\)

Step3: Determine endothermic or exothermic

Since the substance absorbs heat (\(Q> 0\)), it is endothermic.

Answer:

The specific heat of the substance is approximately \(0.67\space J/(g\cdot^{\circ}C)\) and the process is endothermic.