Advertisements
Advertisements
Question
Answer the following question.
Clearly, state the difference between heat and temperature?
Advertisements
Solution
| Heat | Temperature | |
| 1. |
Heat is energy in transit. When two bodies at different temperatures are brought in contact, they exchange heat. OR Heat is the form of energy transferred between two (or more) systems or a system and its surroundings by virtue of their temperature difference. |
Temperature is a physical quantity that defines the thermodynamic state of a system. OR Heat transfer takes place between the body and the surrounding medium until the body and the surrounding medium are at the same temperature. |
| 2. | Heat exchange can be measured with the help of a calorimeter. | Temperature is measured with the help of a thermometer |
| 3. | Heat (being a form of energy) is a derived quantity. | Temperature is a fundamental quantity. |
| 4. | S.I. unit: J (joule) | S.I. unit: K (kelvin) |
| 5. | Dimension: [L2M1T–2 K0] | Dimension: [L0M0T0K1] |
APPEARS IN
RELATED QUESTIONS
Define emissive power and coefficient of emmision of a body.
Two copper spheres of radii 6 cm and 12 cm respectively are suspended in an evacuated enclosure. Each of them are at a temperature 15°C above the surroundings. The ratio of their rate of loss of heat is.................
- 2:1
- 1:4
- 1:8
- 8:1
The dimensions of emissive power are ______.
A pinhole is made in a hollow sphere of radius 5 cm whose inner wall is at temperature 727oC. Find the power radiated per unit area. [Stefan’s constant σ = 5.7 x 10-8 J/m2 s K4 , emissivity (e) = 0.2]
The light from the Sun is found to have a maximum intensity near the wavelength of 470 nm. Assuming the surface of the Sun as a black body, the temperature of the Sun is _____________.
[Wien's constant b = 2 .898 x l0- 3mK]
A metal ball cools from 64 °C to 50 °C in 10 minutes and to 42 °C in next 10 minutes. The ratio of rates of fall of temperature during the two intervals is _______.
The substance which allows heat radiations to pass through is _______.
(A) iron
(B) water vapour
(C) wood
(D) dry air
The kinetic energy per molecule of a gs at temperature T is ________.
(a) `(3/2)RT`
(b) `(3/2)K_BT`
(c) `(2/3) RT`
(d) `(3/2)("RT"/M)`
A body cools from 80° C to 70° C in 5 minutes and to 62° C in the next 5 minutes. Calculate the temperature of the surroundings.
Which of the curves in the following figure represents the relation between Celsius and Fahrenheit temperatures?
Is heat a conserved quantity?
In a calorimeter, the heat given by the hot object is assumed to be equal to the heat taken by the cold object. Does it mean that heat of the two objects taken together remains constant?
A body A is placed on a railway platform and an identical body B in a moving train. Which of the following energies of B are greater than those of A, as seen from the ground?
(a) Kinetic
(b) Total
(c) Mechanical
(d) Internal
A person's skin is more severely burnt when put in contact with 1 g of steam at 100°C than when put in contact with 1 g of water at 100°C. Explain
When a hot liquid is mixed with a cold liquid, the temperature of the mixture ____________ .
The mechanical equivalent of heat ____________ .
If heat is supplied to a solid, its temperature
(a) must increase
(b) may increase
(c) may remain constant
(d) may decrease
The densities of wood and benzene at 0°C are 880 kg m3 and 900 kg m–3 , respectively. The coefficients of volume expansion are 1.2 × 10–3 °C–1 for wood and 1.5 × 10–3 °C–1for benzene. At what temperature will a piece of wood just sink in benzene?
‘An object contains more heat’- is it a right statement? If not why?
Define one mole.
Temperature and Heat are ______
Two objects are said to be in thermal contact if they can exchange heat energy.
The normal temperature of our body is 37°C.
Which state of matter has particles that vibrate about fixed equilibrium positions?
What is the approximate interatomic spacing in gases at NTP (Normal Temperature and Pressure)?
