Specific heat capacity of a mixture

[timelesstrix0]

so for one of my assignments i need to make a calculation which involves the mixture to be made of different types of substance... the heat capacity for each of the different unknown substances that were given:
substance 1 = 1250J/kg °C
substance 2 = 1130J/kg °C
substance 3= 4100J/kg °C

i need to find the heat capacity of the mixture of these 3 substances to carry on with the rest of the problem..
so my question is how do i get the heat capacity for the mixture?? if possible please explain like the concept behind it since i will have to do a presentation on it and will have to explain how i got the heat capacity of the mixture

 

[Chestermiller]

so for one of my assignments i need to make a calculation which involves the mixture to be made of different types of substance... the heat capacity for each of the different unknown substances that were given:
substance 1 = 1250J/kg °C
substance 2 = 1130J/kg °C
substance 3= 4100J/kg °C

i need to find the heat capacity of the mixture of these 3 substances to carry on with the rest of the problem..
so my question is how do i get the heat capacity for the mixture?? if possible please explain like the concept behind it since i will have to do a presentation on it and will have to explain how i got the heat capacity of the mixture

If it is an "ideal solution," the heat capacity of the mixture is simply a weighted average of the heat capacities of the individual components (weighted in terms of mass fractions).