Which letter in the diagram represents the transition from liquid to gas?
Temperature vs. Amount of Heat
Added to a Substance
200
O A
m
OB
D
9 100
C
Temperature (°C)
C
B
OD
0
А
-100
Amount of heat added

Heat transferred : Q = 77.673 J

Given

mass of Copper = 25.25 g

Temperature from 10 °C to 18 °C

Cp = The specific heat of Copper = 0.38452 J/g °C

Required

Heat transferred

Solution

Heat can be calculated using the formula:  

Q = mc∆T  

Q = heat, J  

m = mass, g  

c = specific heat, joules / g ° C  

∆T = temperature difference, ° C / K  

Input the value :

Q = 25.25 g x 0.38452 J/g °C x (18 - 10)

Q = 77.673 J