Question

A certain liquid has a specifi c heat capacity of 4.0 J/(g ºC). How much heat must be supplied to raise the temperature of 10 g of the liquid from 20 ºC to 50 ºC?

Answer 1

this question is based on concept of thermodynamics ,
use formula ,

Q = mS∆T

given,

m = 10g
S = 4.0 j/( g.°C )
∆T = (50 -20)°C = 30°C

now,
Q = 10g × 4.0 j/( g.°C ) × 30°C

= 10 × 4.0 × 30

= 1200 j

hence, 1200 j heat will require .

Answer 2

Q = mS∆T

given,

m = 10g

S = 4.0 j/( g.°C )

∆T = (50 -20)°C = 30°C

now,

Q = 10g × 4.0 j/( g.°C ) × 30°C

= 10 × 4.0 × 30

= 1200 j