Endothermic reactions Study guides, Revision notes & Summaries

Vocabulary: calorimeter, conductor, controlled experiment, dissolve, endothermic, exothermic, insulator, solute, solution, solvent, surroundings, system Prior Knowledge Questions (Do these BEFORE using the Gizmo.) Eduardo hurts his knee during a basketball game. The trainer applies a cold pack, which gets cold after being squeezed. The next day, Eduardo’s friend Beth is going sledding. Beth buys some hand warmers and puts them into her gloves. All morning, her hands stay toasty warm. ...

Feel the Heat Gizmo 2023 Questions and Answers 100%Correct Assured A+. Student Exploration: Feel the Heat Vocabulary: calorimeter, conductor, controlled experiment, dissolve, endothermic, exothermic, insulator, solute, solution, solvent, surroundings, system Prior Knowledge Questions (Do these BEFORE using the Gizmo.) Eduardo hurts his knee during a basketball game. The trainer applies a cold pack, which gets cold after being squeezed. The next day, Eduardo’s friend Beth is going sleddin...

Feel the Heat Gizmo 2023 Questions and Answers 100%Correct Assured A+. Student Exploration: Feel the Heat Vocabulary: calorimeter, conductor, controlled experiment, dissolve, endothermic, exothermic, insulator, solute, solution, solvent, surroundings, system Prior Knowledge Questions (Do these BEFORE using the Gizmo.) Eduardo hurts his knee during a basketball game. The trainer applies a cold pack, which gets cold after being squeezed. The next day, Eduardo’s friend Beth is going sleddin...

1. The movement of food through the intestines is known as: A. Peristalsis B. Ileum translation C. Microvilli propulsion D. Flexure propulsion 2. The enzyme maltase does the following: A. Breaks down lactose to glucose B. Turns glucose into maltose C. Breaks down maltose to glucose D. Turns glucose into lactose 3. High levels of bilirubin in the blood stream can result in: A. Uric acid overexposure B. Jaundice C. Bile salt production D. Hepatic mutation 4. The symbol B on the peri...

Which of the following statements about a physical change is most accurate. A. A physical change does not involve an exchange of energy. B. A physical change is accompanied by some type of chemical change. C. The substance undergoes chemical changes that affect size shape or appearance. D. The substance remains chemically the same but changes in size shape or appearance. - The substance remains chemically the same but changes in size, shape, and appearance. Which of the following is ...

Lattice energy - - The enthalpy change when 1 mole of ionic compound is formed from its gaseous ions under standard conditions - It is the energy given out when ions of opposite charges comes together to form an ionic lattice Lattice energy is endothermic or exothermic? - - It is always exothermic because bonds are being formed (ionic bond) between oppositely charged ions, not broken Equation showing the formation of NaCl lattice - - Na^+(g) + Cl^-(g) > NaCl(s) The state of the opposite...

sig fig zeros - Answer-1. zeros at beginning NOT signif 2. zeros between ARE SIGNIF 3. zeros at end of number are signif if number contains a decimal point 3.489 x (5.67-2.3) - Answer-3.489 x 3.(3)7 11.75793 12 matter - Answer-composed of mass and must occupy space scales of matter - Answer-macroscopic, microscopic, particulate. scientists think on a particulate scale, observe macroscopically states of matter - Answer-1. change from solid to liquid to gas as temp increases 2. motion of...

IB 150 Exam Questions And Answers (Verified And Updated) When the ball stops - answerEnergy is converted into thermal kinetic energy Negatively charged electrons are most stable when - answerIts located very close to the nucleus Low chemical P.E. Electronegativity - answerThe ability to attract electrons High electronegativity - answerElectrons are closer to the nucleus Low electronegativity - answerElectrons are further away from the nucleus What happens when P.E. decreases? - answerEn...

CHEM 103 Lab experiment 4 : Thermochemistry (Portage learning) Purpose: All chemical reactions result in some heat change. Heat changes are important not only in the laboratory but also in everyday life. Procedure: We looked at a basic combustion chemical reaction of methane plus water with a combustion reaction which produced Carbon dioxide and water: CH₄ (g) + 2o2 (g) Co2(g) + 2H2O(e) ΔH= -212.8kcal (Exothemic) CaCo3 CaO + CO2 ΔH = +42.4 Kcal (Endothermic energy coming in) Reverse: ...

Which of the following statements is incorrect? A). a body in motion possesses kinetic energy because of its motion B). an object possess potential energy because of its position or composition C). nuclear energy is an important kind of potential energy. D). chemical reactions and physical changes that release energy to their surroundings are endothermic E). the Law of Conservation of Matter and Energy states that the combined amount of matter and energy in the universe is fixed. - D ...