Problem 1E

What is thermochemistry? Why is it important?

Solution: Step1: a) Distance travelled by the wave in one second is called speed of the wave. It is generally -1 denoted by the letter c and is expressed as ms . It can be measured by using the following formula: Speed of the wave = Total distance covered by water wave / total time taken Step2: b) The distance between two adjacent crests or troughs is called wavelength. It is denoted by the greek letter lambda() and is generally expressed in terms of Angstrom units(A ) [1 A = o 10-10m]. It can be measured by calculating the difference between two adjacent crests or troughs as shown below: Step3: c) The number of waves which pass through a given point in one second is known as the frequency. It is denoted by the greek letter nu() and is generally expressed in terms of Hertz(Hz) [1 Hz = 1 sec ]-1 If c is the velocity of light, is the wavelength, then frequency of the wave can be determined by using the following relation: c = x Step4: d) Frequency of the water wave can also be calculated using the following relation: 1 = -- T In this formula, represents frequency and T represents the time period or amount of time required to complete a single wave cycle. ----------------------