Recent Lessons

Show all results for ""

Feature Overview

Ace your exams with our all-in-one platform for creating and sharing quizzes and tests.

Quizzes

Create quizzes and tests automatically from your content using AI.

Flashcards

Automatically turn your notes into digital flashcards.

Share, Export & Embed

Share with classmates or export to Excel and your learning management system.

Stats & Reporting

Auto-grading quizzes and tests with detailed stats and reports.

Mobile Apps

The smarter way to study – wherever you are.

Pricing

Search...

Mastering Specific Heat and Thermodynamics

11 Questions

1 Views

Mastering Specific Heat and Thermodynamics

Choose a study mode

Play Quiz

Study Flashcards

Spaced Repetition

Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

Which one of these is the correct equation to calculate the amount of energy required to raise the temperature of a substance in a batch heating or cooling process?

$Q/t = MC\Delta T$

$Q/t = mass flow rate \times specific heat \times temp change$

$Q = mass \times average specific heat \times temp change$

$Q = MC\Delta T$ (correct)

Which one of these is the correct definition of specific heat at constant pressure?

The amount of heat required to raise unit mass by unit temperature rise under constant pressure

The amount of heat required to raise unit mass by unit temperature rise under constant volume

The amount of heat required to raise unit mass by unit temperature rise at constant pressure (correct)

The amount of heat required to raise unit mass by unit temperature rise at constant volume

Which one of these is the correct equation to calculate specific heat based on the composition of a substance?

$Cv = \sum(X_i \cdot Cv_i)$

$Cp = \sum(X_i \cdot Cp_i)$ (correct)

$Cp = \sum(X_i \cdot Cv_i)$

$Cv = \sum(X_i \cdot Cp_i)$

Which of the following is true about the behavior of foods during freezing?

The effective freezing time is defined as the time required to reduce the temperature at the fastest cooling point from the ambient temperature to -15°C. Signup and view all the answers

What is the total amount of heat removed to freeze 200kg of apples from 25°C to -20°C?

82,112 kJ Signup and view all the answers

What is the change in enthalpy (ΔH) for a process taking place at constant pressure when heat is absorbed?

ΔH is positive Signup and view all the answers

What is the change in enthalpy (ΔH) for the reverse process of vaporization?

ΔH is negative Signup and view all the answers

Which equation represents the rate of heat loss from the sample in the method of cooling?

$m_1c_1\frac{dT}{dt} + mc_cc = m_2c_2\frac{dT}{dt} + mc_cc$ Signup and view all the answers

What is the purpose of insulating the calorimeter in the method of mixtures?

To minimize heat loss to the surroundings Signup and view all the answers

What is the relationship between the cooling rate and the specific heat in the method of cooling?

The cooling rate is inversely proportional to the specific heat Signup and view all the answers

What is the purpose of using an electrical element in the calorimeter in the electrical methods?

To eliminate heat loss from the calorimeter Signup and view all the answers