C-06 — Effects of Heat on Matter

Heat is a kind of —

On the molecular level, what we call heat energy is actually —

The SI unit of heat is —

Apart from the SI unit, another unit used for heat is —

1 Calorie is equal to —

The amount of heat required to increase the temperature of 1 gm of water by 1°C is called —

The unit of food calorie is —

When a solid is heated, its molecules —

When the molecules of a solid become free by overcoming intermolecular forces, the substance becomes —

In a gas, the molecules —

The flow of heat energy depends on —

When two bodies of different temperatures are in contact, heat flows from —

Heat transfer between two bodies in contact stops when —

According to physics, temperature is the measure of —

In the analogy comparing two connected water containers with heat flow, the height of the water surface corresponds to —

In the same analogy, the volume of water corresponds to —

The property of a substance which changes with temperature and is used to measure temperature is called —

In a mercury thermometer, mercury is the —

The thermometric property of mercury used in a mercury thermometer is —

In a gas thermometer at constant volume, the thermometric property is —

In a resistance thermometer, the thermometric property is —

The two metals usually used in a thermocouple are —

A thermocouple can measure temperature in the range —

Consider the following statements about thermometric substances:

The boiling point of water on the Celsius scale is —

The freezing point of water on the Celsius scale is —

The international (SI) unit of temperature is —

To convert a Celsius reading to a Kelvin reading, we add —

Absolute zero on the Celsius scale is —

Absolute zero on the Kelvin scale is —

The triple point of water on the Kelvin scale is —

The triple point of water on the Celsius scale is —

At the triple point of water, which states coexist together?

The pressure at the triple point of water is approximately —

When Celsius first created his temperature scale, 0 degrees was assigned to —

The freezing point of water on the Fahrenheit scale is —

The boiling point of water on the Fahrenheit scale is —

The relation between Celsius and Fahrenheit temperatures is —

At which temperature do the readings on the Celsius and Fahrenheit scales become equal?

Body temperature 98.4°F equals approximately —

At which temperature do the Kelvin and Fahrenheit readings become equal?

The Celsius and Kelvin readings of the same temperature are equal —

An increase of 10°C in temperature corresponds to an increase on the Kelvin scale of —

The volume of almost all objects when heated —

In the spring model of a solid, the imaginary spring between atoms behaves such that —

When a solid is heated, length, breadth and height of the solid —

The coefficient of linear expansion is denoted by —

The coefficient of area expansion is denoted by —

The coefficient of volume expansion is denoted by —

The formula for length after heating is —

The unit of $\alpha$, $\beta$ and $\gamma$ is —

The relation between $\beta$ and $\alpha$ is —

The relation between $\gamma$ and $\alpha$ is —

In deriving $\beta = 2\alpha$ and $\gamma = 3\alpha$, terms with $\alpha^2$ and $\alpha^3$ are ignored because —

The length of a steel rod is 10 m at 20°C. If the length becomes 10.0167 m at 120°C, the coefficient of linear expansion of steel is —

Small gaps are kept between two rails of a railway track to —

The coefficient of expansion of dental filling material is made equal to that of teeth so that —

Hot water is poured on a stuck cork of a bottle because —

Why does a glass crack when hot water is poured into it?

The density of gold at 30°C is 19.30 g/cc. If $\alpha = 14 \times 10^{-6}$ °C$^{-1}$, the density at 100°C will be approximately —

If a piece of gold is heated 1000°C above its initial temperature, what happens?

Liquids exhibit only —

The expansion of a liquid measured without considering the expansion of its container is called —

The expansion of a liquid measured by considering the expansion of its container is called —

If $V_r$ is real expansion of liquid, $V_a$ is apparent expansion and $V_b$ is expansion of bulb, then —

Generally the expansion of a liquid is —

The most familiar thermometer based on liquid expansion is —

A fine curve is made at the bottom of a clinical thermometer's narrow tube so that —

After measuring temperature with a clinical thermometer, mercury is brought down by —

Compared to solids and liquids, a gas has —

The ideal gas equation is —

The value of universal gas constant R is —

In the ideal gas equation, the temperature T must be in —

The coefficient of volume expansion of an ideal gas at constant pressure equals —

As the temperature decreases, the coefficient of volume expansion of a gas at constant pressure —

The process of solid converting into liquid is called —

The temperature at which fusion starts is called —

During fusion, the temperature of the solid-liquid mixture —

The amount of heat used to convert a whole solid into a liquid at the melting point is called —

The process of liquid converting into gas is called —

The temperature at which vaporization occurs is called —

The boiling point of a liquid depends on —

The amount of heat required to convert a whole liquid into a gas at its boiling point is called —

The process of converting a gas into a liquid is called —

The process of converting a liquid into a solid is called —

If a gas is heated to extremely high temperatures, the molecules become ionized to form —

Drying of wet clothes at any temperature without reaching the boiling point of water is an example of —

We feel cool when sweat evaporates from our body because —

The devastating energy of a cyclone is largely caused by —

Consider the following about latent heat:

The rate of evaporation of a liquid increases if —

A glass of water and a plate containing the same amount of water are kept side by side. The water in the plate evaporates faster because —

The rate of evaporation is highest for liquids that are —

The rate of evaporation of a liquid is the maximum when it is kept in —

To preserve dry food, air is removed using a pump because —

As the temperature of air in contact with a liquid increases, the rate of evaporation —

As the dryness of the air over a liquid increases, evaporation —

Wet clothes do not dry easily in the rainy season because —

Consider the factors influencing the rate of evaporation:

The amount of heat required to raise the temperature of 1 kg of a substance by 1 K is called —

The formula for specific heat is —

Heat capacity of a body is the heat required to raise its temperature by —

If $m$ is mass and $s$ is specific heat, the heat capacity $C$ equals —

The specific heat of water is —

The specific heat of gold is —

The heat capacity of 10 kg of water is —

The heat capacity of 10 kg of gold is —

Compared to water, gold can be heated quickly because —

When a hot body is placed in contact with a cold body, the hot body —

Heat exchange between two bodies continues until they reach —

Assuming no heat loss, the principle of calorimetry states —

A piece of ice of 100 g (at 0°C) is dropped into 1 litre of water at 30°C. Latent heat of fusion of ice is 334 kJ/kg, specific heat of water $4.2 \times 10^3$ J/kg/K. The final temperature of the water is approximately —

1 litre of water at 20°C is mixed with 2 litres of water at 75°C. The final temperature is approximately —

A piece of iron of mass 10 g at 120°C is dropped into 1 kg of water at 30°C ($s_{iron} = 0.45 \times 10^3$ J/kg/K, $s_{water} = 4.2 \times 10^3$ J/kg/K). The final temperature of the water is approximately —

When pressure is applied on ice, its melting point —

When two pieces of ice are pressed together, they unite into a single piece because —

A fine wire passes through an ice bar with weights at both ends but the ice remains in one piece. This phenomenon is due to —

As pressure on a liquid increases, its boiling point —

Cooking takes longer at high mountains because —

A pressure cooker cooks food faster because —

When pressure is applied on a gas, its melting point —

Without much cooling, a gas can be liquefied by —

At the time of construction of a rail line why are small gaps kept in between two rails?

Why do we feel comfort when wind is blown by fans over our sweating body?

With the help of latent heat —

From the ice melting graph (Figure 6.10), how much time was required to melt all of the ice?

From the graph (Figure 6.10), what is the required time in minutes for the water to reach the boiling temperature?

The triple point of water is defined as the temperature and pressure at which —

Two objects contain the same amount of heat but show different temperatures. This is possible because —

The coefficient of linear expansion of copper is $16.7 \times 10^{-6}$ K$^{-1}$. Its coefficient of volume expansion is —

A copper wire of length 30.001 m connects two poles 30 m apart at 30°C. In winter the temperature drops to 4°C. ($\alpha_{Cu} = 16.7 \times 10^{-6}$ K$^{-1}$.) The new length of the wire is approximately —

From the data above, in winter the wire will —

One calorie is the amount of heat required to raise the temperature of —

A 6 m, 6 kg metal rod absorbs 125,000 J of heat and its temperature rises from 30°C to 80°C. Its specific heat capacity is —

Rod 1 (6 m) heated from 30°C to 80°C becomes 6.0051 m. Rod 2 (6 m) heated from 20°C to 60°C becomes 6.0045 m. The two rods are —

The role of evaporation in generating a cyclone's energy is —

Which of the following is a correct difference between heat and temperature?

The statement "the triple point of water is 273.16 K" means that —

Cooking takes longer on high mountains because —