the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.
negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.
the formation of water takes place by giving out heat which is -285.8 kj/mol.
one of the organism in the image is the jelly fish. this image has a clear, transparent saucer shaped jelly with tentacles, this structure is the medusa form of the organisms belonging to the phylum cnidaria. the tentacles are armed with stinging cells (cnidoblasts) for self defence, the cnidocytes have venomous cells called nematocysts that release poisonous substances when touched.
star fish also has certain unique characteristics. one such feature the presence of tube feet on the radial arms of star fish, that in locomotion. star fish can regenerate almost it's entire body.
the hard outer exoskeleton of crabs is one such distinguishing features to avoid predation.
therefore, the characteristics that describe them as living things are:
1. locomotion as seen in