A heat pump is an electrical device that heats a building by pumping heat in from the cold outside. In other words, it's the same as a refrigerator, but its purpose is to warm the hot reservoir rather than to cool the cold reservoir (even though it does both). Let us define the following standard symbols, all taken to be positive by convention:Th = temperature inside buildingTe = temperature outsideQh heat pumped into building in 1 day Qe = heat taken from outdoors in 1 dayW = electrical energy used by heat pump in 1 day What relation among Qh, Qe) and W is implied by energy conservation alone? Will energy conservation permit the COP to be greater than I?

Find the heat of metal and the specific heat capacity (below are the values)   Mass of metal 23.2038g volume of water 100.0 mL Initial temperature of water 25.01 degrees Celcius Initial temperature of Metal 200.00 degrees celcius Max final temperature of water and metal 28.75 degrees celcius mass of water 99.71g change in temperature for water 3.74 degrees celcius Heat of water 156 Joules Change in temperature for metal -171.25 Degrees celcius

1 If a 69 kg person ate 165 calories worth of sugar (about the calories in a typical energy drink and they converted all of that energy to heat immediately, what would be the change in temperature of that person?   A couple of useful facts for this problem.   Food calories are actually kilocalories.   1.000 kilocalorie = 4184 Joule We will assume that the average specific heat of this person's body is 3.00 J/gºC. Enter your answer in ºC with at least 2 sig figs.   Just so you are not afraid to eat or drink things, a healthy body is very good at regulating temperature- the bad news is that unless you use it right away, our bodies are very good at converting sugar into fat.

Energy cannot be created nor destroyed, but it can be transferred between a system and its surroundings. The change in internal energy, AU, is positive if the system absorbs energy, and it is negative if the system releases energy. (Figure 1) The total change in internal energy is the sum of the heat, q, and work, w: AU=q+w. igure AU Allgyntem >0 Al system ▼ Part A Classify the following by the sign of AU for the system. Drag the appropriate items to their respective bins. If no definitive classification can be made, drag the item into the bin labeled "Not enough data." ▸ View Available Hint(s) Negative The system expands and the surroundings get hotter Submit ✓ Correct Part B Submit Previous Answers AU- Value Provide Feedback Positive μA The system contracts and the surroundings get colder. A gaseous reaction occurs at a constant pressure of 30.0 atm and releases 57.1 kJ of heat. Before the reaction, the volume of the system was 6.80 L. After the reaction, the volume of the system…

Hydrogen cyanide (HCN) is prepared from ammonia (NH3) and natural gas (CH4) as shown in the equation below. How many grams of H₂O form when 1,413 kJ of heat is formed? 2NH3(g) + 302(g) + 2CH4 → 2HCN(g) + 6H₂O(g) ΔΗ = -939 kJ

A 18g sample of a material absorbed 898 calories, raising the temperature of the anitmony from 33 degrees C to its melting point (389 degrees C). Calculate the specific heat (cal/g degrees C) of this material.

A heat pump is an electrical device that heats a building by pumping heat in from the cold outside. In other words, it's the same as a refrigerator, but its purpose is to warm the hot reservoir rather than to cool the cold reservoir (even though it does both). Let us define the following standard symbols, all taken to be positive by convention:Th = temperature inside buildingTe = temperature outsideQh heat pumped into building in 1 day Qe = heat taken from outdoors in 1 dayW = electrical energy used by heat pump in 1 day Explain why the "coefficient of performance" (COP) for a heat pump should be defined as Qh /W.

The air in an inflated balloon (defined as the system) is warmed over a toaster and absorbs 130 J of heat. As it expands, it does 79 kJ of work. What is the change in internal energy for the system? Express the energy in kilojoules to two significant figures.