Question

Lead has specific heat 0.03. What does it mean? In short

Answer 1

this answer

Explanation:

is evaporation

Answer 2

Explanation:

40.9 k g lead

Explanation:

The equation you want is

E = m c θ

where E is energy, m is mass, c is specific heat capacity (SHC) and θ

is the change in temperature (note: change).

In the question, we want to find mass, so we rearrange to make mass the subject:

E = m c θ → m = E c θ

We know that

E = 93.4 J , c = 0.129 J g K and θ = 40− 22.3 = 17.7K

(We can easily convert between K

and Celsius because they are on the same scale, but have different starting points. Celsius starts from water freezing at

0 oC , while Kelvin starts at 0

thermal energy, which is about − 273.15 o C . Calculating a change in Celsius gives the same change in Kelvin, because you can ignore the starting points of the scales.)

Now we have

m = 93.4 0.129 × 17.7 = 40.9057 k g