Calorimetry
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
PHXI11:THERMAL PROPERTIES OF MATTER

366359 If mass energy equivalence is taken into account, when water is cooled to form ice, the mass of water should

1 Remain unchanged
2 Increase
3 First increase than decrease
4 Decrease
PHXI11:THERMAL PROPERTIES OF MATTER

366360 A child running at a temperature of \(101^\circ F\) is given an antipyrin (i.e., medicine that lower fever)which causes an increase in the rate of evaporation of sweet from his body. If the fever is brought down to \(97^\circ F\) in \(20\;\min \), what is the average rate of extra evaporation caused by the drug. Assume the evaporation mechanism to be the only way by which heat is lost. The mass of child is \(30\;kg\). The specific heat of the human body is approximately the same as that of water and latent heat of evaporation of water at that temperature is about \(580\,cal/g\).

1 \(4.31\;g/\min \)
2 \(4.31\;g/s\)
3 \(2.31\;g/\min \)
4 \(2.31\;g/s\)
PHXI11:THERMAL PROPERTIES OF MATTER

366361 If \(10\;g\) of water is evaporated from \(1\;{m^2}\) field in one second then heat radiation incident is

1 \(280\frac{{cal}}{s}\)
2 \(5400\frac{{cal}}{s}\)
3 \(54\frac{{cal}}{s}\)
4 \(540\frac{{cal}}{s}\)
PHXI11:THERMAL PROPERTIES OF MATTER

366362 To raise the temperature of \(200\;g\) of ice at \(0^\circ C\) to \(10^\circ C\) by a heater of \(420\;W\), the time required is \((1Cal = 4.2\;J)\)

1 \({\rm{90}}\;{\rm{min}}\)
2 \({\rm{180}}\,\,{\rm{seconds}}\)
3 \(21.2 \mathrm{~min}\)
4 \({\rm{21}}{\rm{.2 seconds}}\)
PHXI11:THERMAL PROPERTIES OF MATTER

366359 If mass energy equivalence is taken into account, when water is cooled to form ice, the mass of water should

1 Remain unchanged
2 Increase
3 First increase than decrease
4 Decrease
PHXI11:THERMAL PROPERTIES OF MATTER

366360 A child running at a temperature of \(101^\circ F\) is given an antipyrin (i.e., medicine that lower fever)which causes an increase in the rate of evaporation of sweet from his body. If the fever is brought down to \(97^\circ F\) in \(20\;\min \), what is the average rate of extra evaporation caused by the drug. Assume the evaporation mechanism to be the only way by which heat is lost. The mass of child is \(30\;kg\). The specific heat of the human body is approximately the same as that of water and latent heat of evaporation of water at that temperature is about \(580\,cal/g\).

1 \(4.31\;g/\min \)
2 \(4.31\;g/s\)
3 \(2.31\;g/\min \)
4 \(2.31\;g/s\)
PHXI11:THERMAL PROPERTIES OF MATTER

366361 If \(10\;g\) of water is evaporated from \(1\;{m^2}\) field in one second then heat radiation incident is

1 \(280\frac{{cal}}{s}\)
2 \(5400\frac{{cal}}{s}\)
3 \(54\frac{{cal}}{s}\)
4 \(540\frac{{cal}}{s}\)
PHXI11:THERMAL PROPERTIES OF MATTER

366362 To raise the temperature of \(200\;g\) of ice at \(0^\circ C\) to \(10^\circ C\) by a heater of \(420\;W\), the time required is \((1Cal = 4.2\;J)\)

1 \({\rm{90}}\;{\rm{min}}\)
2 \({\rm{180}}\,\,{\rm{seconds}}\)
3 \(21.2 \mathrm{~min}\)
4 \({\rm{21}}{\rm{.2 seconds}}\)
PHXI11:THERMAL PROPERTIES OF MATTER

366359 If mass energy equivalence is taken into account, when water is cooled to form ice, the mass of water should

1 Remain unchanged
2 Increase
3 First increase than decrease
4 Decrease
PHXI11:THERMAL PROPERTIES OF MATTER

366360 A child running at a temperature of \(101^\circ F\) is given an antipyrin (i.e., medicine that lower fever)which causes an increase in the rate of evaporation of sweet from his body. If the fever is brought down to \(97^\circ F\) in \(20\;\min \), what is the average rate of extra evaporation caused by the drug. Assume the evaporation mechanism to be the only way by which heat is lost. The mass of child is \(30\;kg\). The specific heat of the human body is approximately the same as that of water and latent heat of evaporation of water at that temperature is about \(580\,cal/g\).

1 \(4.31\;g/\min \)
2 \(4.31\;g/s\)
3 \(2.31\;g/\min \)
4 \(2.31\;g/s\)
PHXI11:THERMAL PROPERTIES OF MATTER

366361 If \(10\;g\) of water is evaporated from \(1\;{m^2}\) field in one second then heat radiation incident is

1 \(280\frac{{cal}}{s}\)
2 \(5400\frac{{cal}}{s}\)
3 \(54\frac{{cal}}{s}\)
4 \(540\frac{{cal}}{s}\)
PHXI11:THERMAL PROPERTIES OF MATTER

366362 To raise the temperature of \(200\;g\) of ice at \(0^\circ C\) to \(10^\circ C\) by a heater of \(420\;W\), the time required is \((1Cal = 4.2\;J)\)

1 \({\rm{90}}\;{\rm{min}}\)
2 \({\rm{180}}\,\,{\rm{seconds}}\)
3 \(21.2 \mathrm{~min}\)
4 \({\rm{21}}{\rm{.2 seconds}}\)
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
PHXI11:THERMAL PROPERTIES OF MATTER

366359 If mass energy equivalence is taken into account, when water is cooled to form ice, the mass of water should

1 Remain unchanged
2 Increase
3 First increase than decrease
4 Decrease
PHXI11:THERMAL PROPERTIES OF MATTER

366360 A child running at a temperature of \(101^\circ F\) is given an antipyrin (i.e., medicine that lower fever)which causes an increase in the rate of evaporation of sweet from his body. If the fever is brought down to \(97^\circ F\) in \(20\;\min \), what is the average rate of extra evaporation caused by the drug. Assume the evaporation mechanism to be the only way by which heat is lost. The mass of child is \(30\;kg\). The specific heat of the human body is approximately the same as that of water and latent heat of evaporation of water at that temperature is about \(580\,cal/g\).

1 \(4.31\;g/\min \)
2 \(4.31\;g/s\)
3 \(2.31\;g/\min \)
4 \(2.31\;g/s\)
PHXI11:THERMAL PROPERTIES OF MATTER

366361 If \(10\;g\) of water is evaporated from \(1\;{m^2}\) field in one second then heat radiation incident is

1 \(280\frac{{cal}}{s}\)
2 \(5400\frac{{cal}}{s}\)
3 \(54\frac{{cal}}{s}\)
4 \(540\frac{{cal}}{s}\)
PHXI11:THERMAL PROPERTIES OF MATTER

366362 To raise the temperature of \(200\;g\) of ice at \(0^\circ C\) to \(10^\circ C\) by a heater of \(420\;W\), the time required is \((1Cal = 4.2\;J)\)

1 \({\rm{90}}\;{\rm{min}}\)
2 \({\rm{180}}\,\,{\rm{seconds}}\)
3 \(21.2 \mathrm{~min}\)
4 \({\rm{21}}{\rm{.2 seconds}}\)