🎁BACK-TO-SCHOOL DEAL. Subscribe Now to get 40% OFF at only 8.49 USD/month, only valid until Sep 30th, 2024

Question

Question
If a sample of 20 mL of water is heated from 7^circ C to 98^circ C what is the energy content of the water?

Asked By MysticMoon98 at

Answered By Expert

Rex

Expert · 3.7k answers · 3k people helped

Sign in to see the answer

Answer

Explanation: Step 1: Identify the variablesIn this problem, we are given the mass of the water (20 mL), the initial temperature (7°C), and the final temperature (98°C). We are asked to find the energy content of the water. Step 2: Use the formula for heatThe formula to calculate the heat (Q) absorbed or released by a substance is given by: **Q = mLΔT**where:- m is the mass of the substance,- L is the specific heat capacity of the substance, and- ΔT is the change in temperature. Step 3: Convert the volume of water to massSince the density of water is approximately 1 g/mL, the mass of 20 mL of water is approximately 20 g. Step 4: Calculate the change in temperatureThe change in temperature (ΔT) is the final temperature minus the initial temperature. In this case, ΔT = 98°C - 7°C = 91°C. Step 5: Use the specific heat capacity of waterThe specific heat capacity (L) of water is 4.184 J/g°C. Step 6: Substitute the values into the formulaSubstitute the values of m, L, and ΔT into the formula to calculate Q: **Q = 20 g * 4.184 J/g°C * 91°C** Answer: After performing the calculation, we find that the energy content of the water is approximately 7625.44 J.

Explanation

🧑‍🏫 More Questions

Which statement best describes ICS Form 201? A. It is completed by the Safety Officer in order to address safety concerns and identify mitigation measures. B. It allows a Single Resource Unit Leader to track major activities during each operational period. C. Lists all resources and organization assignments for the upcoming operations period D. It contains status information for briefing the incoming Incident Commander or other incoming resources.

(1) < omega Unit 7 Progress Check MCQ NEXIGO Unit 7 Progress Check MCQ (1) 2 (3) (4) 0-0 (1) 0-0 (1) (12) (1) (1) (1) (11) (11) (ii) (15) (20) (21) (22) (20) (24) (25) (ac) (27) (21) -2 20 (91) (1.) (11) (9) 15 or 31 Question 15 (2) o ris shamefis lund.

Which occupation would most likely be involved in genome mapping? A gerontologist B geneticist a. geophysicist D geologist

11 What is the first step in constructing an inscribed circle of a triangle? A Bisect three angles of the triangle. B Draw the circle. C Bisect two angles of the triangle. D Construct a perpendicular from the center point to a point on any side of the triangle. (DOK 2)

Both the Readmission and Reconstruction Constitutions eliminated the state senate. increased executive power. forbade Blacks from voting. decreased executive power.