Heat exchange between oil and water. water is flowing at the rate of 1.13 kg/s in a 1-2 shell-and-tube heat exchanger and is heated from 45°c to 85°c by an oil having a heat capacity of 1.95 kj/kg. k. the oil enters at 120°c and leaves at 85°c. calculate the area of the exchanger if the overall heat-transfer coefficient is 300 w/m2.k.

The enthalpy of formation of water is -285.8 kj/mol. what can be inferred from this statement?

Now look at the segment of the graph between the two data points marked with black squares. describe how the boiling point and melting point plots behave between these points. be as specific as possible.

Can anyone explain 1. review your spectrometry data and use the known elements to identify the star's composition. which unknown elements make up this star? justify your element selections. 2. in parts i and ii of the lab, what happened to the electrons of each element to produce the different colors of light? explain your answers using important terms from the lesson and information provided in the laboratory. 3. stars composed of heavier (more massive) elements are often slightly older than stars made predominantly from hydrogen and helium. based on your data, is the newly discovered star a younger star? explain your answer.