Question

If the specific heat capacity of substance B is 1.17 J/g⋅∘CJ/g⋅∘C, what is the specific heat capacity of substance A? Express your answer using two significant figures. " C = _______ J/gdegreesC"

Answer 1

The heat capacity derived is 0.390 J/g°C, and given the properties from Table 9.1, it is likely that the identity of the substance is copper.

Step-by-step explanation:

To determine the specific heat capacity of substance A, we have to first calculate the specific heat for the unknown substance using the given information:

The formula to calculate specific heat capacity (c) is:

c = Q / (m × ΔT)

where:

• Q is the amount of heat in joules
• m is the mass of the substance in grams
• ΔT is the change in temperature in degrees Celsius

Using the information provided:

• Q = 8460 J
• m = 437.2 g
• ΔT = 68.9°C - 19.3°C = 49.6°C

Substitute the values into the formula:

c = 8460 J / (437.2 g × 49.6°C)

c = 0.390 J/g°C