1. Bob is an engineering student who has designed a bridge made completely out of steel. The bridge is 900 m long at the lowest recorded temperature in the area T=-30 °C. Bob knows that the coefficient of linear expansion for steel is a = 12 x 106 °C1, If the highest recorded temperature in the area is T = 30 °C, how much should Bob expect the bridge to expand? 2. Bob built a scale model of the bridge that is 1.500 m long at the lowest temperature (T = -30 °C) using an unknown material. When the temperature reaches the highest value (T= 30 °C), he measures again the length of the bridge finding that it has expanded AL = 1.08 mm. Calculate the coefficient of linear expansion and find the material Bob used to make his model.
Energy transfer
The flow of energy from one region to another region is referred to as energy transfer. Since energy is quantitative; it must be transferred to a body or a material to work or to heat the system.
Molar Specific Heat
Heat capacity is the amount of heat energy absorbed or released by a chemical substance per the change in temperature of that substance. The change in heat is also called enthalpy. The SI unit of heat capacity is Joules per Kelvin, which is (J K-1)
Thermal Properties of Matter
Thermal energy is described as one of the form of heat energy which flows from one body of higher temperature to the other with the lower temperature when these two bodies are placed in contact to each other. Heat is described as the form of energy which is transferred between the two systems or in between the systems and their surrounding by the virtue of difference in temperature. Calorimetry is that branch of science which helps in measuring the changes which are taking place in the heat energy of a given body.
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
