SSC (English Medium) Class 10th Board ExamMaharashtra State Board
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# Balbharati solutions for Class 10th Board Exam Science and Technology - 1 chapter 5 - Heat

## Chapter 5: Heat

#### Chapter 5: Heat solutions [Pages 71 - 72]

Q 1.1 | Page 71

Fill in the blank and rewrite the sentence.

The amount of water vapour in air is determined in terms of its ........... .

Q 1.2 | Page 71

Fill in the blank and rewrite the sentence.

If objects of equal masses are given equal heat, their final temperature will be different. This is due to difference in their ................. .

Q 1.3 | Page 71

Fill in the blank and rewrite the sentence.

During transformation of liquid phase to solid phase, the latent heat is ............ .

Q 2 | Page 71

Observe the following graph. Considering the change in volume of water as its temperature is raised from 0°C, discuss the difference in the behaviour of water and other substances. What is this behaviour of water called?

Q 3.1 | Page 71

What is meant by specific heat capacity?

Q 3.2 | Page 71

How will you prove experimentally that different substances have different specific heat capacities?

Q 4 | Page 71

While deciding the unit for heat, which temperature interval is chosen? Why?

Q 5 | Page 71

Explain the following temperature vs time graph.

Q 6.1 | Page 71

Explain the following:
What is the role of anomalous behaviour of water in preserving aquatic life in regions of cold climate?

Q 6.2 | Page 71

Explain the following:

How can you relate the formation of water droplets on the outer surface of a bottle taken out of refrigerator with formation of dew?

Q 6.3 | Page 71

Explain the following:

In cold regions in winter, the rocks crack due to anomolous expansion of water.

Q 7.1 | Page 72

What is meant by latent heat? How will the state of matter transform if latent heat is given off?

Q 7.2 | Page 72

Which principle is used to measure the specific heat capacity of a substance?

Q 7.3 | Page 72

Explain the role of latent heat in the change of state of a substances?

Q 7.4 | Page 72

On what basis and how will you determine whether air is saturated with vapour or not?

Q 8 | Page 72

If heat is exchanged between a hot and cold object, the temperature of the cold object goes on increasing due to gain of energy and the temperature of the hot object goes on decreasing due to loss of energy.
The change in temperature continues till the temperatures of both the objects attain the same value. In this process, the cold object gains heat energy and the hot object loses heat energy. If the system of both the objects is isolated from the environment by keeping it inside a heat resistant box (meaning that the energy exchange takes place between the two objects only), then no energy can flow from inside the box or come into the box.

i. Heat is transferred from where to where?
ii. Which principle do we learn about from this process?
iii. How will you state the principle briefly?
iv. Which property of the substance is measured using this principle?

Q 9.1 | Page 72

Solve the following problems:

Equal heat is given to two objects A and B of mass 1 g. Temperature of A increases by 3°C and B by 5°C. Which object has more specific heat? And by what factor?

Q 9.2 | Page 72

Solve the following problems:

Liquid ammonia is used in ice factory for making ice from water. If water at 20°C is to be converted into 2 kg ice at 0°C, how many grams of ammonia are to be evaporated? (Given: The latent heat of vaporization of ammonia= 341 cal/g)

Q 9.3 | Page 72

A thermally insulated pot has 150 g ice at temperature 0°C. How much steam of 100°C has to be mixed to it, so that water of temperature 50°C will be obtained? (Given : latent heat of melting of ice = 80 cal/g, latent heat of vaporization of water = 540 cal/g, specific heat of water = 1 cal/g °C)

Q 9.4 | Page 72

Solve the following problems:

A calorimeter has mass 100 g and specific heat 0.1 kcal/ kg °C. It contains 250 gm of liquid at 30°C having specific heat of 0.4 kcal/kg °C. If we drop a piece of ice of mass 10 g at 0°C, What will be the temperature of the mixture?

## Balbharati solutions for Class 10th Board Exam Science and Technology - 1 chapter 5 - Heat

Balbharati solutions for Class 10th Board Exam Science and Technology - 1 chapter 5 (Heat) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the Maharashtra State Board SCC Class 10 Science and Technology part 1 solutions in a manner that help students grasp basic concepts better and faster.

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Concepts covered in Class 10th Board Exam Science and Technology - 1 chapter 5 Heat are Heat - Latent Heat, Regelation, Anomalous behaviour of water, Dew Point and Humidity, Unit of Heat, Calorimetry - Specific Heat Capacity, Measurement of Specific Heat: (Mixing Method) and Calorimeter.

Using Balbharati Class 10th Board Exam solutions Heat exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. The questions involved in Balbharati Solutions are important questions that can be asked in the final exam. Maximum students of Maharashtra State Board Class 10th Board Exam prefer Balbharati Textbook Solutions to score more in exam.

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