Given the equilibrium reaction at constant pressure: 2HBr(g) + 17.4 kcal — H2(g) + Br2(g)
When the temperature is increased, the equilibrium will shift to the
A Right, and the concentration of HBr(g) will increase
B Left, and the concentration of HBr(g) will decrease
C Right, and the concentration of HBr(g) will decrease
D) Left, and the concentration of HBr(g) will increase

C Right, and the concentration of HBr(g) will decrease

Since it is an endothermic reaction the equilibrium will shift to the right direction i.e. product side decreasing concentration f HBr.

a basic solution is an aqueous solution containing more oh-ions than h+ions. in other words, it is an aqueous solution with a ph greater than 7. basic solutions contain ions, conduct electricity, turn red litmus paper blue, and feel slippery to the touch.

explanation:

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e