Question

When a piece of glass was heated with 630 J of energy, the temperature of the glass increased from 36.5°C to 57.5°C. What is the mass of this piece of glass?

a) 20 g
b) 15 g
c) 10 g
d) 25 g

Answer 1

The mass of the glass is approximately 15 grams.

Step-by-step explanation:

To calculate the mass of the glass, we can use the formula:

Q = mcΔT

Where Q is the heat energy, m is the mass, c is the specific heat capacity, and ΔT is the change in temperature.

Given that the glass was heated with 630 J of energy, and the temperature increased from 36.5°C to 57.5°C, we can rearrange the formula to solve for mass:

m = Q / (cΔT)

Since the specific heat capacity of glass is usually around 0.84 J/g°C, we can substitute these values into the formula to solve for mass:

m = 630 J / (0.84 J/g°C * (57.5°C - 36.5°C))

m ≈ 15 g

Therefore, the mass of this piece of glass is approximately 15 grams.