26 What mass of propane needs to be burned to provide 2580 kJ of heat? The standard enthalpy of combustion of propane at 298 K is -2220 kJ·mol⁻¹.(A)25.6 g(B)51.2 g(C)102 g(D)75.9 g(E)37.9 g

36 Which of the following statements regarding the effect of a catalyst on a reaction is not true?(A)A catalyst has no effect on the equilibrium composition of the reaction.(B)A catalyst provides a lower activation energy for the reaction.(C)When a reaction is catalyzed, both forward and reverse reactions are accelerated.(D)A catalyst speeds up a reaction by providing an alternate pathway for the reaction.(E)When a catalyst speeds up a reaction, the rate law remains the same.

26 What mass of propane needs to be burned to provide 2580 kJ of heat? The standard enthalpy of combustion of propane at 298 K is -2220 kJ·mol⁻¹.
(A)25.6 g
(B)51.2 g
(C)102 g
(D)75.9 g

(E)37.9 g

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