Question

To sterilize a 50.0 g glass baby battle, we must raise its temperature from 22°C to 95.0°C. How much heat is required?

Answer 1

`3066` joules

Explanation:

We use the specific heat equation, which states that,

`q=mcDeltaT`

where:

• `q` is the heat energy supplied in joules

• `m` is the mass of substance

• `c` is the specific heat capacity of the substance, which is `(0.84 \ "J")/("g"""^@"C")` for pure glass (source)

• `DeltaT` is the change in temperature

So, we get:

`q=50color(red)cancelcolor(black)"g"*(0.84 \ "J")/(color(red)cancelcolor(black)"g"color(red)cancelcolor(black)(""^@"C"))*(95^@"C"-22^@"C")`

`=50color(red)cancelcolor(black)"g"*(0.84 \ "J")/(color(red)cancelcolor(black)"g"color(red)cancelcolor(black)(""^@"C"))*73color(red)cancelcolor(black)(""^@"C")`

`=3066 \ "J"`