How much heat (in kJ) is evolved when 82.93 g of water cools and freezes from 79.48°C to 0°C? Answer: Check How much heat (in kJ) is needed when 139.01 g of water warms and boils from 33.02°C to 100°C? Answer: Check

How much heat (in kJ) is evolved when 82.93 g of water cools and freezes from 79.48°C to 0°C? Answer: Check How much heat (in kJ) is needed when 139.01 g of water warms and boils from 33.02°C to 100°C? Answer: Check

World of Chemistry

7th Edition

ISBN:9780618562763

Author:Steven S. Zumdahl

Publisher:Steven S. Zumdahl

Chapter10: Energy

Section: Chapter Questions

Problem 53A

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Question

How much heat (in kJ) is evolved when 82.93 g of water cools and freezes from 79.48°C to 0°C?
Answer:
Check
How much heat (in kJ) is needed when 139.01 g of water warms and boils from 33.02°C to 100°C?
Answer:
Check

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Step 1: Determine the heat involved in two processes from the given data:

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Step 2: (i) Calculation for heat evolved in the process:

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Step 3: (ii) calculation for required heat in the process:

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