A car in stop-and-go traffic starts at rest, moves forward 25 m in 8.0 s, then comes to rest again. The velocity-
versus-time plot for this car is given in the
figure(Figure 1).

the earth would become to overheated and everything alive on it will eventually die from overheating. plants will eventually die as well, water will evaporate, and it will be nothing but a hot planet without anything living on it.

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.

b) nuclear ive learned that in a pedtrodic table