Advertisements
Advertisements
Question
To study energy exchange between hot and cold objects, the system of both objects is isolated from the environment by keeping them inside ______.
Options
a heat-resistant box
a rectangular box
Hope’s apparatus
None of these
Advertisements
Solution
To study energy exchange between hot and cold objects, the system of both objects is isolated from the environment by keeping them inside a heat resistant box.
APPEARS IN
RELATED QUESTIONS
What property of water makes it an effective coolant?
Give one example where high specific heat capacity of water is used as heat reservoir ?
45 g of water at 50°C in a beaker is cooled when 50 g of copper at 18° C is added to it. The contents are stirred till a final constant temperature is reached. Calculate this final temperature. The specific heat capacity of copper is 0.39 J g-1K-1 and that of water is 4.2 J g-1K-1. State the assumption used.
Name and state the principle used to measure the specific heat capacity of a substance.
What is the specific heat capacity of melting ice?
What is the unit of heat capacity in CGS system?
Define heat capacity.
If 10125 J of heat energy boils off 4.5 g of water at 100°C to steam at 100°C, find the specific latent heat of steam.
The farmers fill their fields with water in winter. Give reason.
Water falls from a height of 50 m. Calculate the rise in the temperature of water when it strikes the bottom.
(g = 10 ms-2; Specific heat capacity of water = 4200 J / kg°C)
How much heat energy is released when 5 g of water at 20° C changes to ice at 0° C?
[Specific heat capacity of water = 4.2 J g-1 ° C-1 Specific latent heat of fusion of ice = 336 J g-1]
Derive an expression for finding out the specific heat capacity of a body (solid) from the readings of an experiment given below:
(i) Mass of empty calorimeter (with stirrer) = m1 gm
(ii) Mass of the metal piece = M gm
(iii) Mass of colorimeter and water = m2 gm
(iv) Initial temperature and water = t1°C
(v) Temperature of hot solid (metal piece) = t2 °C
(vi) Final temperature of the mixture = t°C
(vii) Specific heat of calorimeter = 0.4 J gm / °C
How much heat energy is necessary to raise the temperature of 5 kg of water from 20°C to 100°C?
All metals have the same specific heat capacity.
Decide the unit for specific heat capacity.
The cold object the hot object enclosed in one box of heat-resistant material.
- What changes will occur in the two objects when temperature flows from those objects?
- Which principle can show that the energy exchange takes place between two objects only when kept in isolated system?
Find the odd one out:
Calculate the amount of heat energy required to raise the temperature of 200 g of copper from 20°C to 70°C. Specific heat capacity of copper = 390 J kg-1 K-1.
