Question: Part A Express your answer in kilojoules to three significant figures. ΔHΔH = kJkJ SubmitPrevious

Question: If the change in enthalpy is -5074.4 kJkJ, how much work is done during the combustion? Express the work in kilojoules to three significant figures.

One object, which is at 400 KK, absorbs 25.0 kJkJ of heat from the other object,which is at 500 KK. What is the net change in entropy ΔSsysΔSsys of the system?

Question: How much heat (in kJkJ) is evolved in converting 2.00 molmol of steam at 135 ∘C∘C to ice at -44 ∘C∘C? The heat capacity of steam is 2.01 J/ (g⋅∘C)J/ (g⋅∘C), and that one of ice is 2.09 J/ (g⋅∘C)J/ (g⋅∘C).

Question: When 1molmol of a gas burns at constant pressure, it produces 2422 JJ of heat and does 6 kJkJ of work. Identify ΔEΔE for the process. Express your answer using one significant figure. Identify ΔHΔH for the process. Express your answer using four significant figures. Identify qq for the process. Express your answer using four significant

Question: Determine the mass of titanium that reacts if 1.62×103 kJkJ of heat is emitted by the reaction.

Question: The energy required to increase the speed of a certain car from 17 m/sm/s to 26 m/sm/s is 185 kJkJ. Part A What is the mass of the car? Express your answer to two significant figures and include appropriate units. part B At what speed is the car’s kinetic energy equal to 185 kJkJ? Express your answer to two significant figures and include appropriate units.

Chemistry questions and answers Determine whether each process is endothermic or exothermic. The process from Part A: q=q= 0.769 kJkJ and w=w= -860 JJ The process from Part B: a system releases 66.7 kJkJ of heat to its surroundings while the surroundings do 44.0 kJkJ of work on the system Both the processes from Parts A and B are exothermic.

Lighters are sometimes fueled by propane (C3H8C3H8). When 1 mole of propane burns at constant pressure, it produces 2096 kJkJ of heat and does 3 kJkJ of work. Part A What is the value of ΔHΔH for the combustion of one mole of propane? Express your answer as an integer.

Question: The energy required to increase the speed of a certain car from 19 m/sm/s to 24 m/sm/s is 205 kJkJ. 1. What is the mass of the car? Express your answer to two significant figures and include appropriate units 2. At what speed is the car’s kinetic energy equal to 205 kJkJ? Express your answer to two significant figures and include appropriate units.