1st law solutions

4. Rowing full speed is putting maximum demands on Jim's muscles. What metabolic process is providing most of the energy for Jim’s muscles at this point and why do Jim's muscles feel like they are burning? (5 points)

Why is the parcel now warmer than it was at sea level on the windward side (what is the source of the heat energy)?

where Q ̇ is the heat transfer rate to the control volume, W ̇ is the work given out per unit time and h is the enthalpy. Exergy balance equation (second law of thermodynamics) for each part of the power plant is presented with Eq. 4.

11) When energy was studied earlier in the year, a connection was found between kinetic energy, potential energy, positive work, and negative work. What is the connection?

P4: Explain the physiology of two named body systems in relation to energy metabolism in the body

4. For the following chemical reaction: C6H12O6 + 6 O2 → 6 CO2 + 6 H2O + energy identify

Calculate the value of the standard free-energy change, ∆G˚, for the combustion of phenol at 25° C.

Question: Define the following… Thermal energy, changes of state, gravitational energy, ocean currents, changes of matter, and water cycle. Answer: Thermal Energy:

always give out or take in energy most of the time this is heat energy

Mass of water x 4.2 (water’s specific heat capacity) x temperature change = energy transferred from the fuel to the water

3. The body changes energy, ATP, into kinetic energy making the body move or thermal energy to keep it warm.

B. There are three main stages to the thermal cycling process. Each step is repeated 20-40 times doubling

In thermodynamics, thermal energy refers to the internal energy present in a system due to its temperature. The concept is not well-defined or broadly accepted in physics or thermodynamics, because the internal energy can be changed without changing the temperature, and there is no way to distinguish which part of a system's internal energy is "thermal". Thermal energy is sometimes used loosely as a synonym for more rigorous thermodynamic quantities such as the (entire) internal energy of a system; or for heat or sensible heat which are defined as types of transfer of energy (just as work is another type of transfer of energy). Heat and work depend on the way in which an energy transfer occurred, whereas internal energy is a property of the state of a system and can thus be understood even without knowing how the energy got there.

refers to the quantity of energy needed to get work done or transfer heat e.g.

2. The relation between Heat produced (H), Work done (W.D), Mechanical Equivalent of Heat (J) is?