Consider the following enthalpy diagram. what is the overall enthalpy change dhrxn for the system? -1,300 kj -300 kj 300 kj 1,300 kj

for the reaction is 300kJ.

Explanation:

By convention:

Energy gained or absorbed is taken as positive and energy released is taken as negative.

In the question,

Reactant A + 2D is absorbing energy of amount 800kJ to reach an intermediate state and at first releasing 200 kJ of energy and then releasing 300 kJ of energy. Thus, total of 500 kJ of energy is released.

So, = Energy gained - Energy lost

Hence, for the reaction is 300kJ.

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

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the cold front replaces the warmer air at the ground level changing the wind to be breezy and denser.there is also an immediate drop in the temperature.