Unrecognized function or variable

2021 3 18
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I am trying to solve for T2 when the equation is equal to zero but it doesn't work, can someone help please?
function assignment8
Hreaction=-802310;
T1=25+275.15;
T2=solve(-Hreaction-(integral(@(T)cpCO2(T),T2,T1)-2*integral(@(T)cpH2Og(T),T1,T2)-0.6*integral(@(T)cpCO2(T),T2,T1)==0)); %J/mol
return
function cp=cpH2Og(T)
% Ideal-gas heat capacity (J/(molK)) for H2O with T in K % Source: GVR
% Appendix 3
a=3.40471e1;
b=-9.65064e-3;
c=3.2998e-5;
d=-2.04467e-8;
e=4.30228e-12;
cp=a+b*T+c*T.^2+d*T.^3+e*T.^4;
return
function cp=cpCO2(T)
% Ideal-gas capacity (J/(molK)) for CO2 with T in K % Source: GVR
% Appendix 3
a=1.90223e1;
b=7.96291e-2;
c=-7.37067e-5;
d=3.74572e-6;
e=-8.13304e-12;
cp=a+b*(T)+c*(T).^2+d*(T).^3+e*T.^4;
return
function cp=cpO2(T)
% Ideal-gas capacity (J/(molK)) for CO2 with T in K % Source: GVR
% Appendix 3
a=2.98832e1;
b=-1.13842e-2;
c=4.33779e-5;
d=-3.70082e-8;
e=1.01006e-11;
cp=a+b*(T)+c*(T).^2+d*(T).^3+e*T.^4;
return

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