Question

If the temperature of 20.5 g of ethanol increases from 21 °C to 74 °C, how much heat has been absorbed by the ethanol? The specific heat of ethanol is 2.44 J/g °C.

Answer 1

`2651.06` joules

Explanation:

We use the specific heat equation, which states that,

`q=mcDeltaT`

• `m` is the mass of the object

• `c` is the specific heat capacity of the object

• `DeltaT` is the change in temperature

We got: `DeltaT=74^@"C"-21^@"C"`

`=53^@"C"`

And so,

`q=20.5color(red)cancelcolor(black)"g"*(2.44 \ "J")/(color(red)cancelcolor(black)"g"color(red)cancelcolor(black)(""^@"C"))*53color(red)cancelcolor(black)(""^@"C")`

`=2651.06 \ "J"`