1. Suppose 3,500[J] of work is done on a system, and 4,000[J] of heat flows into the system during this process. What is the change in thermal energy of the system? Express your answer in Joules. 2. The temperature of the air is 25oC. What is this temperature expressed on the Fahrenheit scale?
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.
1. Suppose 3,500[J] of work is done on a system, and 4,000[J] of heat flows into the system during this process. What is the change in thermal energy of the system? Express your answer in Joules.
2. The temperature of the air is 25oC. What is this temperature expressed on the Fahrenheit scale?
3. The temperature of a cup of hot coffee is 175oF. What is this temperature on the Kelvin scale?
4. A
5. A heat engine is operated between two energy reservoirs at different temperatures, where 10,200[J] of thermal energy flows out of the hot reservoir. If the engine has an efficiency of 0.15, what is the work performed by the engine? Express your answer in Joules.
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
