ifa system is performing 45 Jof work to the surrounding and is gaining 30 J of heat from the surrounding, which oshows the correct signs for heat, work and change in internal energy (AU) representing the system?Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer.q = +, w = +, AU = +q = -,W = ,AU = –q= +,w - -, AU = +q=-,w= +, AU = +q =+,w= =,AU = –q= -, w =+,AU = –

Heat is gaining by the system from the surrounding that means Endothermic process and sign for…

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Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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||| Solving a basic calorimetry problem A sample of polystyrene, which has a specific heat capacity of 1.880 J.g¹.C¹, is put into a calorimeter (see sketch at right) that insulated contains 200.0 g of water. The polystyrene sample starts off at 92.7 °C and the temperature of the water starts off at 15.0 °C. When the temperature of the water stops changing it's 23.1 °C. The pressure remains constant at 1 atm. container Calculate the mass of the polystyrene sample. Be sure your answer is rounded to 2 significant digits. Me g x10 X thermometer. 5 water sample a calorimeter
A chemical reaction takes place inside a flask submerged in a water bath. The water bath contains 6.30 kg of water at 22.3 °C. During the reaction 64.3 kJ of heat flows out of the flask and into the bath. - 1 -1 Calculate the new temperature of the water bath. You can assume the specific heat capacity of water under these conditions is 4.18 J'g *K '. Ве sure your answer has the correct number of significant digits. dlo
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o-phthalic acid, C8H6O4, is sometimes used as a calorimetric standard. Its heat ofcombustion is - 3.224 × 103 kJ/mol C8H6O4. From the following data determine theheat capacity of a bomb calorimeter assembly (i.e., of the bomb, water, stirrer,thermometer, wires, etc.)mass of o-phthalic acid burned: 1.078 ginitial calorimeter temperature 24.96 °Cfinal calorimeter temperature 30.76 °C
The system releases 121 J of energy while 113 J of work was done on it Calculate the change in energy for the following processes and determine if it is endothermic or exothermic. -234 J, exothermic +8 J; exothermic +8 J, endothermic +234 J, exothermic -8 J; endothermic -8 J, exothermic -234 J; endothermic +234 J; endothermic
[Review Topics] [References] Use the References to access important values if needed for this question. Given the standard enthalpy changes for the following two reactions: (1) 2Pb(s) + O2(g) → 2PbO(s) (2) Pb(s) + Cl2 (g) → PbCl₂ (s) AH° what is the standard enthalpy change for the reaction: (3) 2PbCl2 (s) + O2(g) → 2PbO(s) + 2Cl2 (g) AH° = ? Submit Answer AH-434.6 kJ AH = -359.4 kJ kJ Retry Entire Group 9 more group attempts remaining
Which of the following signs on q and w represent a system that is doing work on the surroundings, as well as losing heat to the surroundings? q=-, w = - q=+, W = + q=, W = + q=+, w = - O None of these represent the system referenced above.
uestion 22 of 41 > If a system has 225 kcal of work done to it, and releases 5.00 × 10² kJ of heat into its surroundings, what is the change in internal energy (AE or AU) of the system? kJ AE = étv MacBook Air DII 80 888 F12 F10 F11 F7 FB F9
O Thermochemistry Using specific heat capacity to find heat 0/5 Jaqu Calculate the energy required to heat 474.0 g of cyclohexane from 21.1 °C to 37.1 °C. Assume the specific heat capacity of cyclohexane under these conditions is 1.85 J.g¹K -1 . Round your answer to 3 significant digits. 0 ロ・ロ X μ G ㅁㅁ
A chemical reaction is run in which 172 Joules of heat are generated and 426 Joules of work are done on the system. Calculate the change in the internal energy of the chemical system. ΔΕΞ Joules Submit Answer Heat and Work - First Law: This is group attempt 1 of 10

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