Temperature of an iron block decreases from 850C to 250C. Calculate the heat lost by the block with a mass of 1,200g. (heat capacity of iron=0.115cal/g. °C) O a 1,980 Calories 88,200 Calories 8,280 Calories 29,000 Calories Question 15 A cup of water will freeze at 0°C. Which statement best describes this phase change? O a Endothermic, energy is released. O b Exothermic, energy is released. Exothermic, energy is absorbed. Endothermic, energy is absorbed.

Temperature of an iron block decreases from 850C to 250C. Calculate the heat lost by the block with a mass of 1,200g. (heat capacity of iron=0.115cal/g. °C) O a 1,980 Calories 88,200 Calories 8,280 Calories 29,000 Calories Question 15 A cup of water will freeze at 0°C. Which statement best describes this phase change? O a Endothermic, energy is released. O b Exothermic, energy is released. Exothermic, energy is absorbed. Endothermic, energy is absorbed.

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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