Using given data, calculate the change in Gibbs free energy for each of the following reactions. In each case indicate whether the reaction is spontaneous at 298K under standard conditions.

Part A: 2Ag (s) + Cl2 (g) --> 2AgCl (s) Gibbs free energy for AgCl (s) is -109.70 kJ/mol
Part B: spontaneous or nonspontaneous
Part C: P4O10 (s) + 16H2 (g) --> 4PH3 (g) + 10H2O (g)
Gibbs free energy for P4O10 (s) is -2675.2 kJ/mol
Gibbs free energy for PH3 (g) is 13.4 kJ/mol
Gibbs free energy for H2O (g) is -228.57 kJ/mol
Part D: spontaneous or nonspontaneous
Part E: CH4 (g) + 4F2 (g) --> CF4 (g) + 4HF (g)
Gibbs free energy for CH4 (g) is -50.8 kJ/mol
Gibbs free energy for CF4 (g) is -635.1 kJ/mol
Gibbs free energy for HF (g) is -270.70 kJ/mol
Part F: spontaneous or nonspontaneous
Part G: 2H2O2 (l) --> 2H2O (l) + O2 (g)
Gibbs free energy for H2O2 (l) is -120.4 kJ/mol
Gibbs free energy for H2O (l) is -237.13 kJ/mol
Part H: spontaneous or nonspontaneous

while cooking a piece of 1/2 pound beef steak, a cast iron pan (2.4kg in weight) was heated 260 celsius.

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.

the transfer of heat by electromagnetic radiation is called thermal radiation . it is usually carried out by electromagnetic waves in an energy range just below the visible spectrum, which is the infrared range.

so the answer would be radiation.

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chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.