Explain the difference between a physical and a chemical property. give at least 2 examples of each type of property. chemistry seeks to explain both the physical and chemical properties of matter.

Chemical property is defined as the property of a substance which is observed during a reaction where the chemical composition identity of the substance gets changed.

Example: 1. reactivity of substances

2. Toxicity of substances

Physical property is defined as the property which can be measured and whose value describes the state of physical system. For Example: State, density etc.

Example: 1. Melting Point

2. Density

answer

fusion: the energy source of stars. the energy released from the collapse of the gas into a protostar causes the center of the protostar to become extremely hot. when the core is hot enough, nuclear fusion commences. fusion is the process where two hydrogen atoms combine to form a helium atom, releasing energy.

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35. a insulated cylinder of solid gold (k 310 kw/m-k) of radius v2 m and height 5 m is heated at one end until the temperature at each point in the cylinder is given by w(r, y, z) (30 z2)(2-(r2+ y2). determine the rate of heat flow across each horizontal disk given by z 1, z 2, and z 3, identifying which has the greatest rate of heat flow across it.

explanation: