Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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What causes the glow stick to produce light?
A new material is formed when the glass mixes with Chemical W.
A new material is formed when the glow stick's temperature changes.
A new material is formed when Chemical X and Chemical W are shaken.
A new material is formed when Chemical X mixes with Chemical W.
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- When the two atoms are approaching each other, which statement is true about the potential energy (PE) of the system and the kinetic energy (KE) of the atom? A. Potential energy decreases and kinetic energy increase b. Potential energy increase and kinetic energy decrease c. They both remain constantarrow_forward5. Why does heat transfer from object to object? Heat is energy so it moves Heat transfers because of the temperature differences between objects Heat does not transfer between objects Heat transfers because of the mass difference between objectsarrow_forwardThe amount of energy required to raise the temperature of a substance by 1 K (1 °C) is its heat capacity. If the amount of the substance heated is one gram, it is the ........ heatarrow_forward
- 6. An enthalpy change is a. the difference in the kinetic energy of the reactants and the products in a chemical change b. the difference in the potential energy of the reactants and the products in a chemical change c. the difference in enthalpies of the reactants and the products in a chemical change d. the sum of the potential and kinetic energies of the products e. the sum of the potential and kinetic energies of the reactants 7. Which statement concerning the Law of Conservation of Energy is not true? a. it applies to all chemical changes b. it involves all different forms of energy c. it applies to nuclear reactions d. it includes potential energy e. it involves heat content of substancesarrow_forwardA well insulated calorimeter contains 100 ml of water. 0.100 mol of solid potassium nitrate is added to the water and stirred until it has all dissolved. The water was initially at a temperature of 18.00 °C. After all the potassium nitrate has dissolved the temperature is 7.90 °C. The temperature change is caused by heat energy a. lost from the calorimeter and water to the surroundings b. absorbed in the solution process c. due to the reaction of potassium nitrate with water O d. absorbed from the surroundings into the calorimeter and water Clear my choicearrow_forward"art A Assuming constant pressure, rank these reactions from most energy released by the system to most energy absorbed by the system, based on the following descriptions: A Surroundings get colder and the system decreases in volume. B. Surroundings get hotter and the system expands in volume. C. Surroundings get hotter and the system decreases in volume. D. Surroundings get hotter and the system does not change in volume. Also assume that the magnitude of the volume and temperature changes are similar among the reactions.arrow_forward
- A ring with a mass of 14.8g is tossed into a fire and then removed. The ring’s temperature went from 23.2oC to 55.8oC. During this process, the ring gained 214J of heat. Of what pure metal is the ring composed? A. copper B. iron C. gold D. aluminumarrow_forwardThe 1st law of thermodynamic is called .A The creation of energy .B The conservation of energy .c Functional state law .Darrow_forwardWhen 5.325 g KCL dissolves in 100.0ml of water the temperature decreases from 24.1 c to 21.2 c. Calculate the change in enthalpy per mole of KCL. Determine if the process is endothermic or exothermic.arrow_forward
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